Finding the Value of a Char

[lgbrf]

Could someone explain the correct method for seeing if a char is equal to a certain letter/number, this method comes up with an error. I think the relevant lines would be 2, 12, 18 and 23.

int num1, num2, den1, den2;
    char slash, code;
    float dec1, dec2;
    int numAdd, denAdd;
    int numMult, denMult;
    cout<< "Input a fraction!" << "\n";
    cin>>num1>>slash>>den1;
    cout<< "Input another fraction!" << "\n";
    cin>>num2>>slash>>den2;
    cout<< "You can convert to decimal [A], add [B], or multiply [C] your fraction. Enter your code now.";
    cin>>code;
    if (code == "A"){
        dec1 = num1 / den1;
        dec2 = num2 / den2;
        cout<<"Decimal 1 = "<<dec1;
        cout<<"Decimal 2 = "<<dec2;
    }
    if (code == "B"){
        numAdd = num1 * den2 + den1 * num2;
        denAdd = den1 * den2;
        cout<<"Your fraction is: "<<numAdd<<slash<<denAdd;
    }
    if (code == "C"){
        numMult = num1 * num2;
        denMult = den1 * den2;
        cout<<"Your fraction is: "<<numMult<<slash<<denMult;
    }

I'm using XCode and the error's i get (on line's 12, 18, 23) are:

Result of comparison against a string literal is unspecified (use strncmp instead)

Comparison between pointer and integer ('int' and 'const char *')

Thanks!

[Ispil]

Well, since you're using XCode, replace code == "A" with strncmp(code, 'A', 1). Should work. If not, I'll leave it to someone else who knows more on XCode than I do.

[lgbrf]

Now i get 'No matching function for call to strncmp'

could this be an error with needing one of these:

#include <iostream>

for strings? If so what is it?

[JLBorges]

// if (code == "A"){
if ( code == 'A' ){

'A' 'B' 'C' are literals of type char.

"A" "B" "C" are literal strings.

[lgbrf]

'A' 'B' 'C' are literals of type char.

"A" "B" "C" are literal strings.

That makes sense, thanks!