CPP

how to use string in if else statement c++

double const FRAME_COST = 45.00;
string input;
char yes,
     no;
int frames;


cout << "Do you want additional frames? Type yes/no:  ";
cin  >> input;

    if (input == yes){
       cout << "How many?"
       cin >> frames;
       frames = frames * FRAME_COST;
       }

// The problem is in **the if statement**
// I need to use a string not a bool (according to my professor)
// I can't get the compiler to recognize the **if statement**
// I realize this isn't practical, but he always throws curve balls.

how to use string in if else statement c++

const string YES = "yes";
const string NO = "no";
const double FRAME_COST = 45.0;


int main()
{
    string input;
    double frames;
    cout << "Hello World" << endl; 
    cin >> input;

    if(input == YES)
    {
        cout << "How many?" << endl;
        cin >> frames;
        frames = frames * FRAME_COST;
        cout << frames << endl;
   }

   return 0;
}

how to use string in if else statement c++

if (input == "yes") {
    ...
}