Temperature Unit Conversion

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

float readTemp(int raw, char unit) {
    float celsius = raw * 0.1f ; 
    if(unit == 'F'){
        celsius = celsius * 1.8f + 32.0f;
    }
    return celsius;
}

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

kind of redundant setup