Explanation: Preprocessor directives in C are used to instruct the compiler to preprocess the information before actual compilation starts, such as including header files, conditional compilation, etc.
Explanation: The #include directive is used to include the contents of another file (typically header files) in the current file during compilation.
Explanation: The #define directive in C is used to define macros, which are symbolic names representing a constant value or a snippet of code.
Explanation: The #if directive in combination with #else, #elif, and #endif is used for conditional compilation in C based on certain conditions.
Explanation: The #undef directive is used to undefine a macro that was previously defined using #define in C.
Explanation: The #ifdef directive checks if a macro has been defined using #define, and proceeds with compilation if it is defined.
Explanation: The #pragma directive in C provides implementation-defined directives to the compiler, which can be used for various purposes such as optimizing code, disabling warnings, etc.
Explanation: The ## operator in a macro definition is used for token concatenation in C, allowing multiple tokens to form a single token during macro expansion.
Explanation: The #error directive is used to generate a compile-time error message with a user-defined error message string in C.
Explanation: The #line directive in C is used to change the current line number and the name of the current source file for error messages and debugging purposes.
Explanation: Macros defined with `#define` in C programming represent constant values that can be used throughout the program, often replacing literal values for clarity and maintainability.
Explanation: Macros for function-like operations in C are defined using `#define` followed by the macro name and parameters in parentheses, with the operation inside.
Explanation: Macros defined with `#define` in C enable code reuse by replacing repetitive code snippets with a single macro, improving code readability and maintainability.
Explanation: The `#define` directive in C allows the definition of macros, including multi-line macros, by using backslashes `\` at the end of each line except the last.
Explanation: The `#undef` directive in C is used to remove the definition of a macro previously defined with `#define`, making it unavailable for use in subsequent parts of the program.
Explanation: Macros with parameters defined using `#define` in C programming are expanded by the preprocessor during compilation, replacing the macro invocation with its definition.
Explanation: The `#` operator in a macro definition in C is used for stringification, converting macro arguments into string literals during macro expansion.
Explanation: Macros defined with `#define` in C programming begin with the `#` symbol, followed by the macro name and its definition.
Explanation: Macros defined with `#define` in C are resolved by the preprocessor during preprocessing, which occurs before actual compilation and linking of the program.
Explanation: Macros defined with `#define` in C may cause naming conflicts if not carefully named, potentially leading to unintended substitutions and errors in the program.
Explanation: Macros defined with `#define` in C programming can be redefined, and the new definition replaces the previous one throughout the program.
Explanation: The `#define …` directive in C programming is used to define macros with variable arguments, known as variadic macros, allowing flexibility in the number of arguments passed.
Explanation: The `##` operator in C macro definitions is used for token concatenation, allowing multiple macro arguments to be combined into a single token during macro expansion.
Explanation: Macros defined with `#define` in C programming are expanded by the preprocessor during preprocessing, before actual compilation and linking of the program.
Explanation: Macros defined with `#define` in C programming enable compile-time optimizations by replacing repetitive code with efficient preprocessed directives.
Explanation: The `#include` directive in C programming is used to include system and user-defined header files, allowing access to libraries and declarations necessary for the program.
Explanation: Extensive use of macros defined with `#define` in C programming can introduce subtle bugs due to unexpected interactions and side effects in code.
Explanation: The `#define` directive in C programming is commonly used to define constants, allowing symbolic names to represent constant values throughout the program.
Explanation: The `#ifndef` directive in C programming checks if a specific macro has not been defined using `#define`, allowing conditional compilation based on its absence.
Explanation: Macros defined with `#define` in C programming are local to the file where they are defined, unless explicitly included in other files using `#include`.
Explanation: The `#include` directive in C programming is used to include header files or system libraries in the current source file, providing access to predefined functions and declarations.
Explanation: The `#include` directive in C programming is used to include both system and user-defined header files, facilitating modular programming and code reuse.
Explanation: The `#include
Explanation: In C programming, `#include “header.h”` searches for header files in user-defined directories relative to the current file, while `#include
Explanation: The `#ifndef` directive in conjunction with `#define` and `#endif` is commonly used in C programming to prevent multiple inclusions of a header file, ensuring each file is included only once.
Explanation: Header files in C programming conventionally use the extension .h (e.g., header.h) to distinguish them from source files (.c) containing the actual program code.
Explanation: The `#include` directive in C programming instructs the preprocessor to include the contents of the specified file at compile-time, merging its declarations and definitions with the current file.
Explanation: The `#include
Explanation: In C programming, the order of `#include` directives can influence symbol visibility and compatibility, especially when headers define or declare the same symbols differently.
Explanation: In large C projects, extensive use of `#include` directives can lead to increased compilation time due to multiple file accesses and preprocessing operations.
Explanation: In C programming, `#include filename` without angle brackets or quotes typically includes a user-defined header file located in the current or specified directory.
Explanation: In C programming, to prevent multiple inclusions of a header file, `#ifndef` is followed by `#define` to define a unique identifier, and then concluded with `#endif` to end the conditional block.
Explanation: `#pragma once` in C programming is an alternative method to `#ifndef`, used to prevent multiple inclusions of a header file, ensuring it is included only once per compilation unit.
Explanation: The `#pragma` directive in C programming can be used to specify various implementation-defined directives, but it is not typically used to specify search paths for header files.
Explanation: If the specified file is not found in the current directory, `#include “header.h”` in C programming searches in user-defined directories specified by the build environment.
Explanation: The `#include
Explanation: The primary purpose of the `#include` directive in C programming is to include header files, providing access to declarations, macros, and functions defined in those files.
Explanation: The `#include` directive in C programming is processed by the preprocessor, which operates before actual compilation begins. Including files inside functions has no effect as it operates outside the scope of function execution.
Explanation: The `#include
Explanation: In C programming, header files are conventionally named with a .h extension (e.g., header.h) to distinguish them from source files and indicate their role as header files.
Explanation: The `#ifdef` directive in C programming checks if a specific macro has been defined using `#define`, allowing conditional compilation based on its existence.
Explanation: The `#ifndef` directive in C programming checks if a specific macro has not been defined using `#define`, allowing conditional execution of code when the macro is absent.
Explanation: The `#if` directive in C programming evaluates boolean expressions, allowing conditional compilation based on the result of the expression.
Explanation: If the condition in `#if` or `#elif` directives in C programming evaluates to false, the associated code block is skipped during compilation.
Explanation: The `#else` directive in C programming follows `#if` or `#elif` directives to provide an alternative code block to be executed when the preceding condition is false.
Explanation: The `#elif` directive in C programming is short for “else if”, allowing multiple conditional branches based on different conditions within the same `#if` block.
Explanation: The `#endif` directive in C programming ends a conditional compilation block started by `#if`, `#ifdef`, `#ifndef`, or `#elif`, marking the end of conditional compilation directives.
Explanation: Conditional compilation directives like `#ifdef` and `#ifndef` in C programming are used to selectively include or exclude portions of code based on predefined macros, controlling the compilation process.
Explanation: The `#ifndef` directive in C programming is used to conditionally include code when a specific macro is not defined using `#define`.
Explanation: The `#if defined(MACRO)` directive in C programming checks if a specific macro has been defined using `#define`, allowing conditional compilation based on its existence.
Explanation: The `#ifdef` directive in C programming includes a code block if a specific macro has been defined using `#define`.
Explanation: The `#ifndef` directive in C programming checks if a specific macro has not been defined using `#define`, allowing conditional compilation based on its absence.
Explanation: The `#else` directive in C programming provides an alternative code block to be executed when the preceding `#if`, `#ifdef`, or `#elif` condition is false.
Explanation: The `#endif` directive in C programming ends a conditional compilation block started by `#if`, `#ifdef`, `#ifndef`, or `#elif`, marking the end of conditional compilation directives.
Explanation: The `#elif` directive in C programming allows checking of additional conditions within the same `#if` block, whereas `#else` provides an alternative block when the preceding condition is false.
Explanation: Conditional compilation directives in C programming are primarily used to control which sections of code are included during compilation, allowing for different configurations and feature sets.
Explanation: The `#if` directive in C programming allows for nested conditional compilation blocks, facilitating complex conditional logic based on multiple macro definitions and expressions.
Explanation: In C programming, encountering a `#endif` directive without a preceding `#if`, `#ifdef`, `#ifndef`, or `#elif` directive leads to a compilation error as it lacks a corresponding conditional directive.
Explanation: The `#if` directive in C programming allows for conditional compilation based on numeric expressions, enabling decisions based on arithmetic and logical conditions.
Explanation: The `#ifdef` directive in C programming checks if a specific macro has been defined using `#define`, allowing conditional compilation based on its existence.
#define DEBUG
int main() {
#ifdef DEBUG
printf("Debug mode is enabled.\n");
#else
printf("Debug mode is disabled.\n");
#endif
return 0;
}
What will be the output of this code?Explanation: Since `DEBUG` macro is defined using `#define DEBUG`, the `#ifdef DEBUG` directive evaluates to true, and thus “Debug mode is enabled.” will be printed.
#define VERSION 2
int main() {
#if VERSION == 1
printf("Version 1 is active.\n");
#elif VERSION == 2
printf("Version 2 is active.\n");
#else
printf("Unknown version.\n");
#endif
return 0;
}
What will be the output of this code?Explanation: Here, `VERSION` is defined as 2 (`#define VERSION 2`), so the `#if VERSION == 1` evaluates to false, and `#elif VERSION == 2` evaluates to true, hence “Version 2 is active.” will be printed.
#define VERBOSE 1
int main() {
#if VERBOSE >= 2
printf("Verbose level 2 or higher.\n");
#elif VERBOSE == 1
printf("Verbose level 1.\n");
#else
printf("Verbose level 0.\n");
#endif
return 0;
}
What will be the output of this code?Explanation: `VERBOSE` is defined as 1 (`#define VERBOSE 1`), so the `#if VERBOSE >= 2` evaluates to false, and `#elif VERBOSE == 1` evaluates to true, hence “Verbose level 1.” will be printed.
#define MAX_VALUE 100
int main() {
int value = 110;
#ifdef MAX_VALUE
if (value > MAX_VALUE) {
printf("Value exceeds maximum.\n");
} else {
printf("Value is within limits.\n");
}
#endif
return 0;
}
What will be the output of this code?Explanation: `MAX_VALUE` is defined as 100 (`#define MAX_VALUE 100`), so the `#ifdef MAX_VALUE` directive evaluates to true, and the condition `value > MAX_VALUE` evaluates to true (`110 > 100`), hence “Value exceeds maximum.” will be printed.
#define DEBUG 1
int main() {
#if DEBUG
printf("Debug mode is enabled.\n");
#else
printf("Debug mode is disabled.\n");
#endif
return 0;
}
What will be the output of this code?Explanation: `DEBUG` is defined as 1 (`#define DEBUG 1`), so the `#if DEBUG` directive evaluates to true, hence “Debug mode is enabled.” will be printed.
#define PLATFORM 2
int main() {
#if PLATFORM == 1
printf("Platform 1 detected.\n");
#elif PLATFORM == 2
printf("Platform 2 detected.\n");
#else
printf("Unknown platform.\n");
#endif
return 0;
}
What will be the output of this code?Explanation: `PLATFORM` is defined as 2 (`#define PLATFORM 2`), so the `#if PLATFORM == 1` evaluates to false, and `#elif PLATFORM == 2` evaluates to true, hence “Platform 2 detected.” will be printed.
#define MODE 2
int main() {
#if MODE == 1
printf("Mode 1 selected.\n");
#elif MODE == 2
printf("Mode 2 selected.\n");
#else
printf("Unknown mode.\n");
#endif
return 0;
}
What will be the output of this code?Explanation: `MODE` is defined as 2 (`#define MODE 2`), so the `#if MODE == 1` evaluates to false, and `#elif MODE == 2` evaluates to true, hence “Mode 2 selected.” will be printed.
#define OPTION 3
int main() {
#if OPTION == 1
printf("Option 1 is chosen.\n");
#elif OPTION == 2
printf("Option 2 is chosen.\n");
#else
printf("Default option.\n");
#endif
return 0;
}
What will be the output of this code?Explanation: `OPTION` is defined as 3 (`#define OPTION 3`), so neither `#if OPTION == 1` nor `#elif OPTION == 2` conditions are true, hence “Default option.” will be printed.
#define FEATURE_ENABLED 1
int main() {
#ifdef FEATURE_ENABLED
printf("Feature is enabled.\n");
#else
printf("Feature is disabled.\n");
#endif
return 0;
}
What will be the output of this code?Explanation: `FEATURE_ENABLED` is defined as 1 (`#define FEATURE_ENABLED 1`), so the `#ifdef FEATURE_ENABLED` directive evaluates to true, hence “Feature is enabled.” will be printed.
#define CONFIG_OPTION 0
int main() {
#if CONFIG_OPTION
printf("Config option is enabled.\n");
#else
printf("Config option is disabled.\n");
#endif
return 0;
}
What will be the output of this code?Explanation: `CONFIG_OPTION` is defined as 0 (`#define CONFIG_OPTION 0`), so the `#if CONFIG_OPTION` directive evaluates to false, hence “Config option is disabled.” will be printed.
Explanation: The `__FILE__` macro in C programming expands to the current file name as a string literal.
Explanation: The `__LINE__` macro in C programming expands to the current line number as an integer.
Explanation: The `__DATE__` macro in C programming expands to the current date as a string literal in the format “MMM DD YYYY”.
Explanation: The `__TIME__` macro in C programming expands to the current time as a string literal in the format “HH:MM:SS”.
int main() {
printf("File: %s\n", __FILE__);
printf("Line: %d\n", __LINE__);
printf("Date: %s\n", __DATE__);
printf("Time: %s\n", __TIME__);
return 0;
}
What will be the output of this code?Explanation: This code uses predefined macros `__FILE__`, `__LINE__`, `__DATE__`, and `__TIME__` to print information about the current file, line number, date, and time.
Explanation: The `__LINE__` macro in C programming expands to the current line number as an integer.
Explanation: The `__FILE__` macro in C programming expands to the current file name as a string literal.
Explanation: The `__DATE__` macro in C programming expands to the current date as a string literal in the format “MMM DD YYYY”.
Explanation: The `__TIME__` macro in C programming expands to the current time as a string literal in the format “HH:MM:SS”.
#define DEBUG
int main() {
#ifdef DEBUG
printf("Compiled on %s at %s\n", __DATE__, __TIME__);
#endif
return 0;
}
What will be the output of this code?Explanation: Since `DEBUG` is defined, the `#ifdef DEBUG` directive is true, and it prints the current compilation date and time using `__DATE__` and `__TIME__` macros.
#define FUNCTION_NAME __func__
void display_info() {
printf("Function: %s\n", FUNCTION_NAME);
printf("File: %s\n", __FILE__);
printf("Line: %d\n", __LINE__);
printf("Compiled on: %s at %s\n", __DATE__, __TIME__);
}
int main() {
display_info();
return 0;
}
What will be the output of this code?Explanation: This code uses `__func__`, `__FILE__`, `__LINE__`, `__DATE__`, and `__TIME__` macros to print information about the current function, file, line number, and compilation date/time.
Explanation: The `__func__` macro in C programming expands to the current function name as a string literal.
#define PROJECT "C_Project"
void log_message(const char *msg) {
printf("[%s] %s (%s:%d)\n", PROJECT, msg, __FILE__, __LINE__);
}
int main() {
log_message("Error occurred");
return 0;
}
What will be the output of this code?Explanation: The `log_message` function uses `__FILE__` and `__LINE__` macros to print the current file name and line number where the `log_message` function is called.
#define DEBUG 1
int main() {
#ifdef DEBUG
printf("Debug message: Compiled on %s at %s\n", __DATE__, __TIME__);
#else
printf("Release message: Compiled on %s at %s\n", __DATE__, __TIME__);
#endif
return 0;
}
What will be the output of this code if compiled with `DEBUG` defined?Explanation: Since `DEBUG` is defined, the `#ifdef DEBUG` directive is true, and it prints the current compilation date and time using `__DATE__` and `__TIME__` macros.
#define LOG_INFO(message) printf("[INFO] %s (%s:%d)\n", message, __FILE__, __LINE__)
int main() {
LOG_INFO("Application started");
return 0;
}
What will be the output of this code?Explanation: The `LOG_INFO` macro uses `__FILE__` and `__LINE__` macros to print the current file name and line number where `LOG_INFO` is invoked, along with the message “Application started”.
#define MESSAGE "Hello, World!"
int main() {
printf("%s\n", MESSAGE);
printf("Compiled on %s at %s\n", __DATE__, __TIME__);
return 0;
}
What will be the output of this code?Explanation: This code prints the message “Hello, World!” defined by `MESSAGE`, and then prints the current compilation date and time using `__DATE__` and `__TIME__` macros.
#define FUNCTION_INFO printf("Function: %s (%s:%d)\n", __func__, __FILE__, __LINE__)
void display_info() {
FUNCTION_INFO;
printf("Compiled on: %s at %s\n", __DATE__, __TIME__);
}
int main() {
display_info();
return 0;
}
What will be the output of this code?Explanation: The `display_info` function uses `__func__`, `__FILE__`, `__LINE__`, `__DATE__`, and `__TIME__` macros to print information about the current function, file, line number, and compilation date/time.
#define LOG_ERROR(msg) fprintf(stderr, "[ERROR] %s (%s:%d)\n", msg, __FILE__, __LINE__)
int main() {
LOG_ERROR("File not found");
return 0;
}
What will be the output of this code?Explanation: The `LOG_ERROR` macro uses `__FILE__` and `__LINE__` macros to print the current file name and line number where `LOG_ERROR` is invoked, along with the error message “File not found”.
#define DEBUG 1
int main() {
#if DEBUG
printf("Debugging information:\n");
printf("Compiled on %s at %s\n", __DATE__, __TIME__);
#else
printf("Release information:\n");
printf("Compiled on %s at %s\n", __DATE__, __TIME__);
#endif
return 0;
}
What will be the output of this code if compiled with `DEBUG` defined?Explanation: Since `DEBUG` is defined, the `#if DEBUG` directive is true, and it prints the debugging information and current compilation date and time using `__DATE__` and `__TIME__` macros.
#define LOG_DEBUG(msg) printf("[DEBUG] %s (%s:%d)\n", msg, __FILE__, __LINE__)
int main() {
LOG_DEBUG("Debug message");
return 0;
}
What will be the output of this code?Explanation: The `LOG_DEBUG` macro uses `__FILE__` and `__LINE__` macros to print the current file name and line number where `LOG_DEBUG` is invoked, along with the debug message “Debug message”.
#define SQUARE(x) ((x) * (x))
int main() {
int num = 5;
printf("Square of %d is: %d\n", num, SQUARE(num));
return 0;
}
What will be the output of this code?Explanation: The `SQUARE` macro calculates the square of a number `x`. In this case, `SQUARE(num)` expands to `((num) * (num))`, resulting in 25.
#define CUBE(x) ((x) * (x) * (x))
int main() {
int num = 3;
printf("Cube of %d is: %d\n", num, CUBE(num + 1));
return 0;
}
What will be the output of this code?Explanation: The `CUBE` macro calculates the cube of a number `x`. In this case, `CUBE(num + 1)` expands to `((num + 1) * (num + 1) * (num + 1))`, resulting in 64.
#define MAX(a, b) ((a) > (b) ? (a) : (b))
int main() {
int x = 10, y = 20;
printf("Maximum of %d and %d is: %d\n", x, y, MAX(x, y));
return 0;
}
What will be the output of this code?Explanation: The `MAX` macro returns the maximum of two numbers `a` and `b`. In this case, `MAX(x, y)` expands to `((x) > (y) ? (x) : (y))`, resulting in 20.
#define MIN(a, b) ((a) < (b) ? (a) : (b))
int main() {
int x = 15, y = 8;
printf("Minimum of %d and %d is: %d\n", x, y, MIN(x, y));
return 0;
}
What will be the output of this code?Explanation: The `MIN` macro returns the minimum of two numbers `a` and `b`. In this case, `MIN(x, y)` expands to `((x) < (y) ? (x) : (y))`, resulting in 8.
#define ABS(x) ((x) < 0 ? -(x) : (x))
int main() {
int num = -5;
printf("Absolute value of %d is: %d\n", num, ABS(num));
return 0;
}
What will be the output of this code?Explanation: The `ABS` macro calculates the absolute value of a number `x`. In this case, `ABS(num)` expands to `((num) < 0 ? -(num) : (num))`, resulting in 5.
#define MAX3(a, b, c) ((a) > (b) ? ((a) > (c) ? (a) : (c)) : ((b) > (c) ? (b) : (c)))
int main() {
int x = 10, y = 5, z = 15;
printf("Maximum of %d, %d, and %d is: %d\n", x, y, z, MAX3(x, y, z));
return 0;
}
What will be the output of this code?Explanation: The `MAX3` macro returns the maximum of three numbers `a`, `b`, and `c`. In this case, `MAX3(x, y, z)` expands to a nested conditional expression that computes the maximum, resulting in 15.
#define POWER(base, exp) ({ \
int result = 1; \
for (int i = 0; i < exp; ++i) \
result *= base; \
result; \
})
int main() {
int num = 2, exponent = 4;
printf("%d raised to the power of %d is: %d\n", num, exponent, POWER(num, exponent));
return 0;
}
What will be the output of this code?Explanation: The `POWER` macro calculates the power of a `base` raised to an `exp` exponent using a for loop. In this case, `POWER(num, exponent)` expands to a block ({ ... }) that computes 2 raised to the power of 4, resulting in 16.
#define MULTIPLY(x, y) ((x) * (y))
int main() {
int a = 5, b = 4;
printf("Product of %d and %d is: %d\n", a, b, MULTIPLY(a + 1, b + 2));
return 0;
}
What will be the output of this code?Explanation: The `MULTIPLY` macro calculates the product of two numbers `x` and `y`. In this case, `MULTIPLY(a + 1, b + 2)` expands to `((a + 1) * (b + 2))`, resulting in 20.
#define SUM(a, b) ((a) + (b))
int main() {
int x = 8, y = 5;
printf("Sum of %d and %d is: %d\n", x, y, SUM(x++, y--));
return 0;
}
What will be the output of this code?Explanation: The `SUM` macro calculates the sum of two numbers `a` and `b`. In this case, `SUM(x++, y--)` expands to `((x++) + (y--))`, resulting in 12.
#define DIFFERENCE(a, b) ((a) - (b))
int main() {
int x = 15, y = 7;
printf("Difference between %d and %d is: %d\n", x, y, DIFFERENCE(x--, y++));
return 0;
}
What will be the output of this code?Explanation: The `DIFFERENCE` macro calculates the difference between two numbers `a` and `b`. In this case, `DIFFERENCE(x--, y++)` expands to `((x--) - (y++))`, resulting in 8.
#define MAX4(a, b, c, d) (MAX(MAX(a, b), MAX(c, d)))
#define MAX(x, y) ((x) > (y) ? (x) : (y))
int main() {
int w = 5, x = 10, y = 7, z = 12;
printf("Maximum of %d, %d, %d, and %d is: %d\n", w, x, y, z, MAX4(w, x, y, z));
return 0;
}
What will be the output of this code?Explanation: The `MAX4` macro calculates the maximum of four numbers `a`, `b`, `c`, and `d` using nested `MAX` macros. In this case, `MAX4(w, x, y, z)` expands to `(MAX(MAX(w, x), MAX(y, z)))`, resulting in 12.
#define AREA(width, height) ((width) * (height))
int main() {
int w = 6, h = 4;
printf("Area of rectangle with width %d and height %d is: %d\n", w, h, AREA(w + 2, h - 1));
return 0;
}
What will be the output of this code?Explanation: The `AREA` macro calculates the area of a rectangle given its width and height. In this case, `AREA(w + 2, h - 1)` expands to `((w + 2) * (h - 1))`, resulting in 26.
#define AVERAGE(x, y) (((x) + (y)) / 2)
int main() {
int num1 = 9, num2 = 5;
printf("Average of %d and %d is: %d\n", num1, num2, AVERAGE(num1 * 2, num2 * 3));
return 0;
}
What will be the output of this code?Explanation: The `AVERAGE` macro calculates the average of two numbers `x` and `y`. In this case, `AVERAGE(num1 * 2, num2 * 3)` expands to `(((num1 * 2) + (num2 * 3)) / 2)`, resulting in 9.
#define MAX5(a, b, c, d, e) (MAX(MAX(MAX(MAX(a, b), c), d), e))
#define MAX(x, y) ((x) > (y) ? (x) : (y))
int main() {
int a = 5, b = 8, c = 12, d = 3, e = 9;
printf("Maximum of %d, %d, %d, %d, and %d is: %d\n", a, b, c, d, e, MAX5(a, b, c, d, e));
return 0;
}
What will be the output of this code?Explanation: The `MAX5` macro calculates the maximum of five numbers `a`, `b`, `c`, `d`, and `e` using nested `MAX` macros. In this case, `MAX5(a, b, c, d, e)` expands to `(MAX(MAX(MAX(MAX(a, b), c), d), e))`, resulting in 12.
#define CIRCLE_AREA(radius) (3.14 * (radius) * (radius))
int main() {
int r = 4;
printf("Area of circle with radius %d is: %.2f\n", r, CIRCLE_AREA(r + 1));
return 0;
}
What will be the output of this code?Explanation: The `CIRCLE_AREA` macro calculates the area of a circle given its radius. In this case, `CIRCLE_AREA(r + 1)` expands to `(3.14 * (r + 1) * (r + 1))`, resulting in approximately 50.24.