C ++ set traversal

The key is to declare iterator variables. The traversal method is similar to an array. You can use either a while loop or a for loop, but the conditional operator cannot use <while using a for loop! = Make judgments and pay special attention to pointer operators .

Code:

#include<iostream>
#include<set>
using namespace std;

set<int>all;
int main()
{
    //生成待处理的数据
    for(int i=0;i<100;i++)
        all.insert(i);
    //遍历set,用迭代器类型
    for(set<int>::iterator i=all.begin();i!=all.end();i++)
        cout<<*i<<endl; //注意指针运算符
    return 0;
}