Simple dice game, error message

Question

I am trying to build a really simple first game with simulated dice rolls.

I am getting an error on line 49: if(rollResult>aiRollResult).

I'm sure it's just a really simple syntax error with all the if statements but I cannot figure out how to fix it or can I not call the airoll() function in the middle of my code like I did?

#include <iostream>
#include <string>
#include <cstdlib>
#include <ctime>

using namespace std;

void airoll();

int main() {
    int b;
    srand(time(0));
    //random die roll
    int rollResult = 1+(rand()%6);

    switch (rollResult) //results options {
        case 1: {
            cout<<"Your Roll: 1"<<endl;
        }
        break;
        case 2: {
            cout<<"Your Roll: 2"<<endl;
        }
        break;
        case 3: {
            cout<<"Your Roll: 3"<<endl;
        }
        break;
        case 4: {
            cout<<"Your Roll: 4"<<endl;
        }
        break;
        case 5: {
            cout<<"Your Roll: 5"<<endl;
        }
        break;
        case 6: {
            cout<<"Your Roll: 6"<<endl;
        }
        break;
    }

    airoll();

    if(rollResult>aiRollResult) {
        cout<<"You win!"<<endl;
    }

    if (aiRollResult>rollResult) {
        cout<<"You lose!"<<endl;
    }

    if (rollResult==aiRollResult) {
        cout<<"It's a tie!"<<endl;
    }
}

void airoll() {
    int aiRollResult=1+(rand()%6);
    cout<<"AI roll: "<<aiRollResult<<endl;
}

Answer 1

Your variable aiRollResult is not defined in the scope of the main() function. It only exists in the scope of the airoll() function. Change your airoll() to

int airoll()
{
    int aiRollResult=1+(rand()%6);
    cout<<"AI roll: "<<aiRollResult<<endl;
    return aiRollResult;
}

Notice the int return type.

Now you can get the result of the airoll() in the main function as follows:

int aiRollResult = airoll();

Which will call the airoll() function and then store the result in the variable. That should solve your problem. Learn more about functions here: http://www.cplusplus.com/doc/tutorial/functions/