if(input = letter)?

[Donald8274]

Hello, before I ask my question i'd like to say thanks for looking at my question. Ok so, I am making a converter for Celsius into Fahrenheit vice versa. I am stuck at getting it to see if the return value of an input is a letter. Any help would be appreciated. Thanks again.

#include <iostream>
using namespace std;

int main ()
{
    char degree;
    int celsius;
    int fahrenheit;
    
    cout << "Would you like to convert Celsius (c) or Fahrenheit (f)? ";
    cin >> degree;
    
    if (degree == "c") {
              cout << "Enter your desired degree in Celsius: ";
              cin >> celsius;
    
              int factorc;
              factorc = 212 - 32;
    
    
              fahrenheit = factorc * celsius/100 + 32;
    
              cout << celsius << " degrees Celsius is " << fahrenheit << " degrees fahrenheit." << endl;
    
              system("PAUSE");
              return 0;
    }
     if (degree == "f") {
               cout << "Enter your desired degree in Fahrenheit: ";
               cin >> fahrenheit;
               
               int factorf;
               factorf = 212 + 32;
               
               celsius = factorf/fahrenheit * 100 - 32;
               
               cout << fahrenheit << " degrees Fahrenheit is " << celsius << " degrees Celsius." << endl;
               
               system("PAUSE");
               return 0;
     }
}

[Zhuge]

Use single quotes around a character literal, like 'c' and 'f'.

[Moonraker]

You are using char type for the input. Replace the double quotes around c and f with single quotes.

[Donald8274]

Zhuge, thank you very much. I had no idea I have to use single quotes. =D

[ModShop]

If cin gets a data type it doesn't expect, it will fail. You can check this with cin.fail().

if (cin.fail())
{
    cin.clear();
    cout << "Please enter a number!\n";
}

[shahj]

You need to make sure about case as well meaning

if ( degree =='c' || degree =='C')
{....}

same thing with Fahrenheit.

I also want to point that you need your variable type as either float or double.