C program to swap two numbers using function

C program to swap two numbers using function

Output:

Enter two numbers to swap:
5 7
Before swapping:
a=5 b=7
After swapping:
a=7 b=5

Implementation:

#include <stdio.h> int a,b; void swap() { a=a+b; b=a-b; a=a-b; printf("After swapping:\n"); printf("a=%d b=%d",a,b); } int main(void) { printf("Enter two numbers to swap:\n"); scanf("%d %d",&a,&b); printf("Before swapping:\n"); printf("a=%d b=%d\n",a,b); swap(); return 0; }