error "was not declared in this scope" c ++ [closed]

I give you the answer here:

Errors you have

int main() {

    int n1, n2, resultado;
    string operacion ;

    string suma = "suma";
    string resta = "resta";
    string multiplicacion = "multiplicacion";
    string division = "division";
    cout << "Ingrese numero 1           ";
    cin >> n1;
    cout << "Ingrese número 2           ";
    cin >> n2;
    cout << "Ingrese operacion          ";
    cin >> operacion;
    if (operacion == suma) {
        resultado = n1 + n2;
        cout << "Elresultado de la suma es  " << resultado;
    }
    else {
        if (operacion == resta) {
            resultado = n1 - n2;
            cout << "El resultado de la resta es  " << resultado;
        }
        else {
            if (operacion == multiplicacion) {
                resultado = n1 * n2;
                cout << " El resultado de la multiplicación es " << resultado;
            }
            else {
                if (operacion == division) {
                    resultado = n1 / n2;
                    cout << " Elresultado de la división es" << resultado;
                }
            }
        }
    }

    return 0;
}

I have read the errors and they are several: You have not declared the variables of addition, subtraction, multiplication and division. To do this, you can do it this way:

string suma = "suma";
string resta = "resta";
string division = "division";
string multiplicacion = "multiplicacion";

Another error is that you have missed a ) in some line of your code. Try to put the line where you get the error to know where it is.

Finally, you have asked if there is a variable to put signs. Yes, there is, it is the variable type char , that you have used it at the beginning of the code and, for the exercise that you propose, I do not think it is useful. You could create a variable of type string string operacion; and not one of type char; . Also, instead of declaring variables addition, subtraction etc ... you can simply put:

if(operacion == "suma"){

    //Código.

}

Instead of saving the value in a variable of type string , you put the value directly in the if . This way you save yourself creating more variables, although they always come in handy.

NOTICE

You have used unclaimed variables (multiplication, for example) named with a tilde, that is, NO declare a variable like this: int multiplicación; Declare it with this name: int multiplicacion; . Always without accents or ñ , those characters are not allowed and are annoying if you are working with others who do not have them.

char   operacion (15) ;

sera?

char   operacion [15] ;

or better:

std::string operacion;

Or how do you want to define the operacion ? Yes with the words "addition", "subtraction", etc. the string serves you, comparing it operacion == "suma" , etc. If you prefer a symbol '+' , '-' , etc, you define the operation as char and you compare it with =='+' , etc.