Temperature Unit Conversion

#include <iostream>
using namespace std;
 
float readTemp(int raw)
{
    return raw / 10.0f;
}

float readTemp(int raw, char unit)
{
    if (unit == 'C')
    {
        return readTemp(raw);
    }

    if (unit == 'F')
    {
        return (readTemp(raw) * 1.8f + 32.0f);
    }
}

int main() {
    int raw;
    char unit;
    cin >> raw >> unit;
 
    if (unit == 'D') {
        cout << readTemp(raw);
    } else {
        cout << readTemp(raw, unit);
    }
 
    return 0;
}