Question

Write a program to swap two numbers​

Answer 1

Answer:

Swap Numbers Using Temporary Variable

#include<stdio.h>

double first, second, temp;

printf("Enter first number: ");

scanf("%lf", &first);

printf("Enter second number: ");

scanf("%lf", &second);

// Value of first is assigned to temp.

temp = first;

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Answer 2

Answer:

#include<iostream.h>

#include<conio.h>

void main()

{

clrscr();

int a, b;

//input

cout<<"\nEnter first number:";

cin>>a;

cout<<"\nEnter second number:";

cin>>b;

cout<<"\nNumbers before swap=";

cout<<a<<endl<<b;

//swap

a=a+b;

b=a-b;

a=a-b;

//output

cout<<"\nNumbers after swap=";

cout<<a<<endl<<b;

getch();

}