[백준] 화성수학 5355 C++

#include <iostream>
#include <string>
#include <algorithm>
 
using namespace std;
 
int main() {
 
    string N;
    int n;
    getline(cin, N);
    n = stoi(N);
 
    string s;
    float first;
    float *result = new float[n];
    
    for (int i = 0; i<n; i++){
        getline(cin, s);
        first = stof(s);
        s = s.substr(2, s.size() - 1);
        s.erase(remove(s.begin(), s.end(), ' '), s.end());
        
        for (int j = 0; j<s.size(); j++){
            if (s[j] == '@')
                first *= 3;
            if (s[j] == '%')
                first += 5;
            if (s[j] == '#')
                first -= 7;
        }
 
        result[i] = first;
    }
 
    for (int j = 0; j<n; j++){
        printf("%.2f\n", result[j]);
    }
 
    return 0;
}