回答編集履歴
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追記
answer
CHANGED
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@@ -13,4 +13,71 @@
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};
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```
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みたいな感じにしてやった方が読みやすいと思います。
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みたいな感じにしてやった方が読みやすいと思います。
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---
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ファイル入出力を省略し標準入出力にて代替すると
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```c++
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#include <iostream>
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#include <fstream>
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#include <string>
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#include <sstream>
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#include <vector>
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using namespace std;
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using P = pair<int,int>;
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class Student {
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string name;
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string code;
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vector<P> scores;
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public:
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Student(istream& fin);
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void print(ostream& fout) const;
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};
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Student::Student(istream& fin){
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string line;
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// name & code
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getline(fin, line);
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auto sep = line.rfind(" ");
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name = line.substr(0, sep);
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code = line.substr(sep+1);
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// scores
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for(getline(fin, line); !line.empty(); getline(fin, line)) {
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istringstream ss(line);
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int score, num;
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ss >> score >> num;
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scores.emplace_back(score, num);
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}
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};
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void Student::print(ostream& fout) const {
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fout << name << " " << code << " ";
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long long total = 0;
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double total_weight = 0;
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for(const auto& [score, weight] : scores){
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total += score * weight;
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total_weight += weight;
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}
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fout << total / total_weight << "\n";
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}
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int main(){
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vector<Student> s;
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while(cin){
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s.emplace_back(cin);
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}
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for(const auto& p : s) p.print(cout);
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}
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```
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