What is the program to swap two numbers?

[Bharat89]

Hi Friends,

I am studying in BSC(IT). I have to write the program to swap the two numbers (Integer or float). I have tried to write this program, but when I run the program it goes into the indefinite looping. I am getting frustrated because of this. If you are able to provide me the program code for swapping the two numbers, then it will be better for me. Simple logic will also works for me.
Your help will be greatly appreciated...

[Zecho]

Hi friend,

Try the below program code to swap two numbers. This program is successfully running on my computer:

#include<stdio.h>
#include<conio.h>
void main()
{
int x,y;
printf("Enter two numbers");
scanf("%d%d",&x,&y);

x=x+y;
y=x-y;
x=x-y;

printf("\n X = %d \n Y = %d\n");
getch();
}

[Reegan]

I don't think it's too difficult to write program for swapping two numbers. It's very simple logic, you have to first store value of the one number into the one variable. For reference see below code:

#include<stdio.h>
int main()
{
int p,q;
printf("Enter values for two numbers i.e p & q\n");

scanf("%d %d",&p,&q);

q = q+p;
p= q-p;
q=q-p;

printf("p = %d,q = %d",p,q);

}

[opaper]

Have you tried below logic to swap to numbers??

//M and N are the two variable which we have to swap
M=M+N;
N=M-N;
M=M-N;

Please implements this logic and let me know if it is working or not.