How to calculate the absolute difference between two numbers in the C programming language?

In C language, you can use the abs() function to calculate the absolute difference between two numbers. The prototype of the abs() function is as follows:

int abs(int x);

Example of use:

#include <stdio.h>
#include <stdlib.h>

int main() {
    int a = 10;
    int b = 5;
    int diff = abs(a - b);
    printf("两个数的差的绝对值为：%d\n", diff);
    
    return 0;
}

Output the results:

两个数的差的绝对值为：5