[C++]: Conditional operator

#include <iostream>
#include <string>

using namespace std;
int main(){

    int a = 5;
    int b = 6;
    string result;

    b==a ? (result = "YES") : (result = "NO");
    cout << "B it's equal a A? " << result << endl;
    b<a ? (result = "YES") : (result = "NO");
    cout << "B it's less than A? " << result << endl;
    b>a ? (result = "YES") : (result = "NO");
    cout << "B it's biger than A? " << result << endl;
    system("PAUSE");
    return 0;

}