Question

Write a program to swap two numbers without using a third variable.

Answer 1

Answer:

a,a-d and a+d is the right ans because of the 3 no. which are same difference with each other

Answer 2

Answer:

Let's see a simple c example to swap two numbers without using third variable.

#include<stdio.h>

int main()

{

int a=10, b=20;

printf("Before swap a=%d b=%d",a,b);

a=a+b;//a=30 (10+20)

b=a-b;//b=10 (30-20)

a=a-b;//a=20 (30-10)