Temperature Unit Conversion

#include <iostream>
using namespace std;
 
// Write your code here
float readTemp(int raw){
    return (raw * 0.1);
}
float readTemp(int raw, char unit){
    if(unit == 'C') return (raw * 0.1);
    if(unit == 'F') return (raw * 0.1)*1.8 + 32;
}
int main() {
    int raw;
    char unit;
    cin >> raw >> unit;
 
    if (unit == 'D') {
        cout << readTemp(raw);
    } else {
        cout << readTemp(raw, unit);
    }
 
    return 0;
}

Solving Approach