14 – Best C program to swap two numbers without third variable

#include<stdio.h>

int main()
{
    int x,y;
    printf("Enter value for first(x) number : ");
    scanf("%d",&x);
    printf("Enter value for second(y) number : ");
    scanf("%d",&y);
    x=y+x;
    y=x-y;
    x=x-y;
    printf("nValue of x after swapping : %d", x);
    printf("nValue of y after swapping : %d", y);
    return 0;
}