模板的简单使用（vector）

Posted 2021-03-16 2015-16

上代码：

 1 //用结构和STL常用算法实现对学生成绩的排序和查找。
 2 #include<iostream>
 3 #include<vector>
 4 #include<algorithm>
 5 #include<cstring>
 6 using namespace std;
 7 
 8 struct Student
 9 {
10     string name;
11     string id;
12     double score;
13     Student(string name_ = " ",string id_ = " ",double score_ = 0):
14     name(name_),id(id_),score(score_) { }
15     bool operator == (const Student& rhs)
16     {
17         return score== rhs.score;
18     }
19     bool operator < (const Student& rhs)
20     {
21         return (score < rhs.score);
22     }
23 };
24 
25 void Printvector(const vector<Student> & vv)
26 {
27     typename vector<Student>::const_iterator i;
28     for(i = vv.begin();i != vv.end();i++)
29         cout<<i->name<<" "<<i->id<<" "<<i->score<<endl;
30 }
31 
32 int main()
33 {
34     vector <Student> v;
35     int n,i = 0;
36     string name_,id_;
37     double score_;
38     Student s1;
39     cin>>n;
40     while(1)
41     {
42         cin>>name_>>id_>>score_;
43         v.push_back( Student(name_,id_,score_) ); 
44         if(++i == n)
45             break;
46     }
47     cout<<"请输入待查找成绩 ："<<endl; 
48     cin>>score_;
49     s1.score = score_;
50     vector <Student> :: iterator p;
51     p = find(v.begin(),v.end(),s1);
52     if(p != v.end())
53         cout<<"存在成绩 ："<<score_<<endl;
54     else
55         cout<<"不存在该成绩"<<endl; 
56     sort(v.begin(),v.end());
57     Printvector(v);
58     return 0;
59 } 

2020-01-11