Question

Today I start to learn c++ a bit and I begins to understand with simple code, but this make confuse me

#include <iostream>

using namespace std;

class MyVar
{

    public:
        MyVar(){
            cout << "this is constructor" << endl;
        }
        void accesscheckpass(string x){
            checkpass(x);
        }

    private:
        bool checkpass(string x){
            if(x == "password"){
                return true;
            }
        }
};

int main()
{
    int inputpass;
    cout << "please enter your password\n" << endl;
    cin >> inputpass;

    MyVar MyAccess;

    if(MyAccess.accesscheckpass(inputpass) == true){
        cout << "welcome user 1" << endl;
    }else{
        cout << "get lost !" << endl;
    }

}

I want to validate the user when he/she entered the password, then when to section IF, when I want to compile it, compiler return the status “invalid conversion from ‘int’ to ‘const char*’ [-fpermissive]|”, please someone repair my code and explain what i’m wrong ?

Answer 1

please someone repair my code

Try to repair it yourself after we explain what’s wrong. You’ll gain much more from it than by us posting your code.

explain what i’m wrong

Sure. The method accesscheckpass expects a std::string as parameter (btw you need to #include <string> at the top of the file). You call it as

MyAccess.accesscheckpass(inputpass)

but inputpass is declared as int inputpass;, so it’s and int, not a std::string. So you either have to declare inputpass as a string or find out how to convert an int to a string. (should be easy)

Also, your method:

    bool checkpass(string x){
        if(x == "password"){
            return true;
        }
    }

only returns if the condition is true. You should have an else branch as well:

    else
        return false;

or, better yet, return the result directly.

    bool checkpass(string x){
        return x == "password";
    }

and your method

    bool accesscheckpass(string x){
       return  checkpass(x);
    }

should return a bool as well.