#include<stdio.h> 
#include<limits.h> 
#include<stdlib.h> 
  
int addOvf(int* result, int a, int b) 
{ 
   if( a > INT_MAX - b) 
     return -1; 
   else
   { 
     *result = a + b; 
      return 0; 
   } 
} 
  
int main() 
{ 
  int *res = (int *)malloc(sizeof(int)); 
  int x = 2147483640; 
  int y = 10; 
  
  printf("%d", addOvf(res, x, y)); 
  printf("\n %d", *res); 
  getchar(); 
  return 0; 
}