Swap Two Numbers in C
Code below swaps two numbers without using a third variable # include<stdio.h> int swap(int* a, int *b){ // swapping values using match trick *a = *a + *b; *b = *a - *b; *a = *a - *b; return 0; } int main(){ int a, b; printf("Enter two numbers"); scanf("%d %d", &a, &b); printf("a=%d, b=%d", a, b); swap(&a, &b); printf("a=%d, b=%d", a, b); return 0; } Output: Enter two numbers 10 34 before swapping a=10, b=34 After swapping a=34, b=10