c program to Swap Numbers

Program to SWAP the three digit number
#include<    >

void main ()
{

int b,r,n,r1,r2;
clrscr ();
printf ("Enter the Value: ");
scanf ("%d",&n);
r=n%10;
n=n/10;
r1=n%10;
n=n/10;
r2=n%10;
n=n/10;
b=(r*100)*(r2*10)+(r2);
printf ("%d%d%d",r,r1,r2);
getch ();

}

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