#include <set> #include <iostream> using namespace std; struct Student { char *name; int year; char *addr; }; void find_test() { multiset<int> ms; ms.insert(10); ms.insert(11); ms.insert(12); ms.insert(13); ms.insert(14); ms.insert(15); ms.insert(16); ms.insert(17); ms.insert(18); ms.insert(13); ms.insert(19); //find the element 13 int v = 19; multiset<int>::iterator i_v = ms.find(v); cout<<*i_v<<endl; //equal_range search the element 13 v = 13; pair<multiset<int>::iterator , multiset<int>::iterator> p = ms.equal_range(v); cout<<"大于等于"<<v<<"的第一个元素为(x>=k)为 "<<*p.first<<endl; cout<<"大于"<<v<<"的第一个元素(x>k)为 "<<*p.second<<endl; //打印重复键值元素13 multiset<int>::iterator i; cout<<"键值为 "<< v <<"的所有元素为 "; for (i = p.first; i!=p.second; i++) { cout<<*i<<' '; } cout<<endl; cout<<endl; } //比较函数 struct StudentLess { bool operator()(const Student &s1, const Student &s2)const { return (s1.year) < (s2.year) ; } }; void other_multiset() { Student stuArray[] = { {" 李强", 21, "北京"}, {" 月月", 23, "西安"}, {" 大力", 21, "美国"}, {" 小二", 22, "南非"}, {" 小明", 23, "日本"}, }; //create a object of multiset multiset<Student, StudentLess>ms(stuArray, stuArray+5, StudentLess()); //count cout<<"学生人数: "<<ms.size()<<endl<<endl; cout<<"年龄为21岁的学生人数"<<ms.count(stuArray[0])<<endl<<endl; //print all //multiset<Student>::iterator i, iend;//报错!!! //<c++ STL开发技术导引>上的代码是这么写的,vs2010报错,和下面的迭代器类型不同 multiset<Student, StudentLess>::iterator i, iend; iend=ms.end(); cout<<"姓名 " <<"年龄 "<<"地址 \n"; for (i=ms.begin(); i!=iend; i++) { cout<<(*i).name<<" "<<(*i).year<<" "<<(*i).addr<<" "<<endl; } cout<<endl; } int main() { find_test(); other_multiset(); getchar(); return 0; }
结果:
下面链接是当时出现的问题:
http://bbs.csdn.net/topics/390724469?page=1#post-396890764
时间: 2024-10-31 11:12:28