in my c++ program when i run the program it asks me the first question and then the display closes please help. #define MOD26 26 #define

in my c++ program when i run the program it asks me the first question and then the display closes please help.

#define MOD26 26

#define REPORTCOLUMNS "   InputCode    SumOfPairs   Sum%%26   ValidatedCoden"

#define REPORTFORMAT "   %10s%16d%12d%17s%cn"

#define ADDR(var) &var // prog defined macro definitions

#define getPairSum(d1,d2) (d1 - '0')*10 + (d2 - '0')

#include <stdio.h>

int main(void)

{