Temperature Unit Conversion

#include <iostream>
using namespace std;
 
// Write your code here
float readTemp(int raw){
    return raw/10;
}

float readTemp(int raw, char unit){
    switch (unit) {
    case 'C':
        return readTemp(raw);
    break;
    case 'F':
        return readTemp(raw)*1.8 +32;
    break;
    default:
        return 0;
    break;
    }
}
 
int main() {
    int raw;
    char unit;
    cin >> raw >> unit;
 
    if (unit == 'D') {
        cout << readTemp(raw);
    } else {
        cout << readTemp(raw, unit);
    }
 
    return 0;
}

Solving Approach