[学习][STL]unique和erase

//在vector中的应用
#include <iostream>
#include<cstdio>
#include<vector>
#include<algorithm>
using namespace std;

vector<int> a;vector<int>::iterator p;

int main()
{
    int n;scanf("%d",&n);
    for(int i=1;i<=n;i++){int x;scanf("%d",&x); a.push_back(x);}
    sort(a.begin(),a.end());
        printf("vector排序:
"); for(p=a.begin();p<a.end();p++) printf("%d%c",*p,p==a.end()-1?'
':' ');
    vector<int>::iterator it=unique(a.begin(),a.end());
        printf("vector‘去重’:
"); for(p=a.begin();p<it;p++) printf("%d%c",*p,p==it-1?'
':' ');
        printf("‘去重’后的整个vector:
"); for(p=a.begin();p<a.end();p++) printf("%d%c",*p,p==a.end()-1?'
':' ');
    a.erase(it,a.end());
        printf("vector‘去重’后删去多余元素:
"); for(p=a.begin();p<a.end();p++) printf("%d%c",*p,p==a.end()-1?'
':' ');
    return 0;
}
//在数组中的应用类似

运行结果：