Function-like Macro

Easy Preprocessor & Header Files
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Problem Statement

Write a C program using a function-like macro `#define ABS(x) ((x) < 0 ? -(x) : (x))` to compute the absolute value of an integer.

Input Format

A single integer N.

Output Format

Print the absolute value.

Constraints

-10000 <= N <= 10000

Sample Input

-25

Sample Output

25

Explanation

Macro computes absolute value of -25 as 25.

Starter Code

#include <stdio.h>
#define ABS(x) ((x) < 0 ? -(x) : (x))

int main() {
    int n;
    if (scanf("%d", &n) == 1) {
        // Write your code here
    }
    return 0;
}

Limits

  • Time Limit: 1s
  • Memory Limit: 256MB

Embedded C Programming

Updated: March 15, 2026
Intermediate

Embedded systems rely on efficient low-level programming to interact directly with hardware. In this course, you will learn how to write practical Embedded C programs used in real microcontroller-based systems. Rather than focusing only on theory, this course follows a practice-driven approach. Each lesson includes hands-on coding exercises that simulate real firmware development tasks used