09.Input two numbers and swap them.

//Program to input two numbers and swap them.
#include<stdio.h>
#include<conio.h>

void main()
{
    int number_1, number_2;

    clrscr();

    printf("Enter two numbers: ");
    scanf("%d%d", &number_1, &number_2);

    number_1 = number_1 + number_2;
    number_2 = number_1 - number_2;
    number_1 = number_1 - number_2;

    printf("The swapped numbers are: %d %d", number_1, number_2);

    getch();
}