Temperature Unit Conversion

#include <iostream>
using namespace std;
 
// Write your code here
float readTemp(int raw){
    return (float)(raw * 0.1);
}

float readTemp(int raw, char unit){
    if(unit == 'C'){
        return raw * 0.1;
    }
    else if(unit == 'F'){
        return (raw * 0.1) * 1.8+32;
    }
    else return 0;
}
 
int main() {
    int raw;
    char unit;
    cin >> raw >> unit;
 
    if (unit == 'D') {
        cout << readTemp(raw);
    } else {
        cout << readTemp(raw, unit);
    }
 
    return 0;
}

Solving Approach