/* Demonstration of nested loops */ 
#include<stdio.h>
main( ) 
{ 
     int r, c, sum ; 
     for ( r = 1 ; r <= 3 ; r++ ) /* outer loop */ 
     { 
         for ( c = 1 ; c <= 2 ; c++ ) /* inner loop */ 
         { 
            sum = r + c ; 
            printf ( "r = %d c = %d sum = %d\n", r, c, sum ) ; 
         }
         system("pause");          
     } 
     system("pause");
}