CHECK FOR INTEGER OVERFLOW

#include <bits/stdc++.h>
using namespace std;
  
int addOvf(int* result, int a, int b)  { 
    *result = a + b; 
    if(a > 0 && b > 0 && *result < 0) 
        return -1; 
    if(a < 0 && b < 0 && *result > 0) 
        return -1; 
    return 0; 
} 
  
int main()  { 
    int *res = new int[(sizeof(int))]; 
    int x = 2147483640; 
    int y = 10; 
  
    cout << addOvf(res, x, y); 
    cout << "\n" <<*res; 
    return 0; 
}