Question

Write A C Program To Swap Two Numbers

Answer 1

C Program to swap two numbers without 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)

Answer 2

Answer:

C Program to swap two numbers without third variable

1. #include<stdio.h>
2. int main()
3. {
4. int a=10, b=20;
5. printf("Before swap a=%d b=%d",a,b);
6. a=a+b;//a=30 (10+20)
7. b=a-b;//b=10 (30-20)
8. a=a-b;//a=20 (30-10)