質問編集履歴
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誤植
test
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c++ sort
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c++ sort ファイル
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test
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名前,年齢,所在地が1行ずつ書かれているのでそれを読み込んで名前順に並べ替え,名前が同じ場合は年齢順,年齢も同じなら所在地順というふうにしたいのですが, ソートの仕方が分からないです.
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一部ですが12th.inの中身はこんな感じです！↓
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Cynthia 115 Aichi
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Teresa 1 Iwate
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Vincent 28 Ishikawa
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Kimberly 99 Gifu
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Terry 49 Kagawa
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Richard 64 Yamanashi
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Janet 113 Kochi
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...
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何人分とかは分からないです.
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できればソート関数を使わずにクラスmArrayを完成させたいです.
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下記のコードでエラーは特に出ませんが,並べ替えが理想とは全然違いもはやランダムのようになって出力されてしまいます...!
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些細なところでも構わないので助けていただけると嬉しいです.
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```c++
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#include<iostream>
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#include<string>
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#include<fstream>
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#include<stdexcept>
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using namespace std;
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class cPerson
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{
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string name;
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int age;
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string location;
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public:
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cPerson(string name, int age, string location){
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(*this).name = name;
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(*this).age = age;
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(*this).location = location;
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}
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friend istream& operator>>(istream& is, const cPerson& a);
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friend ostream& operator<<(ostream& os, const cPerson& b);
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bool operator<(cPerson c){
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if(name > c.name){
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if(age > c.age){
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if( location > c.location){
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return true;
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}
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else
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{
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return false;
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}
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}
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else
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{
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return false;
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}
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}
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else
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{
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return false;
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}
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}
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};
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ostream& operator<<(ostream& os, const cPerson& b){
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os << b.name << " " << b.age << " " << b.location;
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return os;
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}
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class mArray{
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string name;
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int age;
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string location;
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public:
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void sort(){
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string s,t;
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if(s<t){
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string x;
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x = s;
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s = t;
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t = x;
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}
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}
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};
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int main(){
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string name;
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int age;
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string location;
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ifstream ifs("12th.in");
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ofstream ofs("12th.out");
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if(!ifs){
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cerr << "Error:file not opened." << "\n";
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return 1;
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}
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ifs >> name >> age >> location;
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while(getline(ifs,name)){
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mArray aB;
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aB.sort();
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ofs << name << " " << age << " " << location << "\n";
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}
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return 0;
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}
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```
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