could do:
#include
int main ()
{
int i , j , k , h;
int sum = 0;
cout << "enter 4 numbers:" << endl;
cin >> i;
cin >> j;
cin >> k;
cin >> h;
if ( i % 2 != 0 )
{
sum += i;
}
if ( j % 2 != 0 )
{
sum += j;
}
if ( k % 2 != 0 )
{
sum += k;
}
if ( h % 2 != 0 )
{
sum += h;
}
cout << "sum of odds: " << sum << endl;
return 0;
}