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法律研究多集 insert（）在 C++ STL 中的函数
C++ STL 中的多集 insert() 函数将元素从一个位置插入多集容器到另一个位置，从一个多集到另一个多集。
使用的函数列表
- ms.size() = 返回多集的大小。
- ms.insert() = 用于向多集中插入元素。
示例代码
#include <iostream>
#include <set>
#include <string>
#include <cstdlib>
using namespace std;
int main() {
multiset<int> ms;
multiset<int>::iterator it, it1;
int c, i;
while (1) {
cout<<"1.Size of the Multiset"<<endl;
cout<<"2.Insert Element into the Multiset"<<endl;
cout<<"3.Display Multiset"<<endl;
cout<<"4.Exit"<<endl;
cout<<"Enter your Choice: ";
cin>>c;
switch(c) {
case 1:
cout<<"Size of the Multiset: "<<ms.size()<<endl;
break;
case 2:
cout<<"Enter value to be inserted: ";
cin>>i;
if (ms.empty())
it1 = ms.insert(i);
else
it1 = ms.insert(it1, i);
break;
case 3:
cout<<"Elements of the Multiset: ";
for (it = ms.begin(); it != ms.end(); it++)
cout<<*it<<" ";
cout<<endl;
break;
case 4:
exit(1);
break;
default:
cout<<"Wrong Choice"<<endl;
}
}
return 0;
}输出
1.Size of the Multiset 2.Insert Element into the Multiset 3.Display Multiset 4.Exit Enter your Choice: 1 Size of the Multiset: 0 1.Size of the Multiset 2.Insert Element into the Multiset 3.Display Multiset 4.Exit Enter your Choice: 2 Enter value to be inserted: 1 1.Size of the Multiset 2.Insert Element into the Multiset 3.Display Multiset 4.Exit Enter your Choice: 2 Enter value to be inserted: 2 1.Size of the Multiset 2.Insert Element into the Multiset 3.Display Multiset 4.Exit Enter your Choice: 2 Enter value to be inserted: 4 1.Size of the Multiset 2.Insert Element into the Multiset 3.Display Multiset 4.Exit Enter your Choice: 2 Enter value to be inserted: 6 1.Size of the Multiset 2.Insert Element into the Multiset 3.Display Multiset 4.Exit Enter your Choice: 2 Enter value to be inserted: 7 1.Size of the Multiset 2.Insert Element into the Multiset 3.Display Multiset 4.Exit Enter your Choice: 3 Elements of the Multiset: 1 2 4 6 7 1.Size of the Multiset 2.Insert Element into the Multiset 3.Display Multiset 4.Exit Enter your Choice: 4 exit status 1
更新时间： 30-7-2019
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