Write down a program in C for swapping of two numbers a) using + / - operator code example

Example: c program for swapping of two numbers using temporary variable

#include <stdio.h>
int main()
{
    int a, b, temp;
    printf("enter the values of a and b: \n");
    scanf("%d%d", &a, &b );
    printf("current values are:\n a=%d\n b=%d\n", a, b);
    temp=a;
    a=b;
    b=temp;
    printf("After swapping:\n a=%d\n b=%d\n", a, b);
}