数组中插入元素（C++）

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用静态数组太麻烦，动态的相对来说跟方便

int main(){    vector <int >num(6,9);//产生6个9    for (int i = 0; i < num.size(); i++)    {        cout << num[i] << " ";    }    cout << endl;    vector<int>::iterator it;    it = num.begin()+2;    num.insert(it, 11); // {9,9,11，9，9，9，9}    for (int i = 0; i < num.size(); i++)    {        cout << num[i] << " ";    }    return 0;}//insert有很多重载方法：#include <iostream>#include <vector>int foofun(int v) {    return v;}int main (){    std::vector<int> foo1(3,9);    std::vector<int> foo2(3,9);    std::vector<int> foo3(3,9);    std::vector<int> foo4(3,9);    std::vector<int> foo5(3,9);    std::vector<int>::iterator it;    // single element (1)    it = foo1.begin();    foo1.insert(it,11); // {11,9,9,9}    // fill (2)    it = foo2.begin();    foo2.insert(it,2,7); // {7,7,9,9,9}    // range (3)    int fooarray[] = {1,2,3,4,5};    it = foo3.begin();    foo3.insert(it,fooarray + 1,fooarray + 4); // {2,3,4,9,9,9}    // move (4)    it = foo4.begin();    foo4.insert(it,foofun(5)); // {5,9,9,9}    // initializer list (5)    it = foo5.begin();    foo5.insert(it,{1,2,3}); // {1,2,3,9,9,9}    return 0;}

#python的话。。。。。。#人生苦短，就用pythonnum=[0,1,2,3,4]print(num)#[0,1,2,3,4]num.append(5)#末尾添加print(num)#[0,1,2,3,4,5]num.insert(1,20)#也可以把元素插入到指定的位置，比如索引号为1的位置print(num)#[0,20,1,2,3,4,5]num.pop()#删除list末尾的元素，用pop()方法print(num)#[0,20,1,2,3,4]num.pop(1)#删除指定位置的元素，用pop(i)方法，其中i是索引位置print(num)#[0,1,2,3,4]

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