[C++知识库]C++ vector动态数组的for与for_each操作

1.?for (type?&元素?: 数组)

2.?for (auto 指针变量?= 数组.begin();? 指针变量 != 数组.end(); 指针变量++)

3.?vector<type>::iterator iters;? ? ? ? //迭代器指针
? ? for (iters = 数组.begin(); iters != 数组.end(); iters++)

4.?for_each(数组.begin(), 数组.end(), 函数);

#include<functional>
#include<algorithm>
#include <iostream>
#include <vector>
#include <string>
#include <iterator>

using namespace std;

void funcs(string elem)
{
    cout << elem << endl;
}
void funci(int elem)
{
    cout << elem*3 << endl;
}

int main()
{
    vector<string> msg = {"Fine!", "the C++", "World", "from", "Deepin", "with ATOM!"};

    for (string &word : msg)
    {
        cout << word << " ";
    }
    cout << endl;

    vector<int> v = {1,2,3,4};
    v.push_back(7); v.push_back(9);
    for (int &mint : v) {
        cout << mint << " " << endl;
    }

    vector<char> v1 = {'a','b','c','d'};
    v1.push_back('m'); v1.push_back('n');
    for (char &mchar : v1) {
        cout << mchar << " " << endl;
    }

    vector<string> v5 = {"aadf","sdfsf","werwr"};
    v5.push_back("hello"); v5.push_back("world");

    for (string &myvar : v5) {            //for (string myvar : v5)
      cout << myvar << " " << endl;
    }

    for (auto itemsi = v5.begin(); itemsi != v5.end(); itemsi++)
    {
      printf("v5b: ", *itemsi);
      cout << "v5b: " << *itemsi << endl;
    }

    vector<string>::iterator iters;
    for (iters = v5.begin(); iters != v5.end(); iters++)
    {
      printf("v5a: ", *iters);
      cout << "v5a: " << *iters << endl;
    }

    for_each(msg.begin(), msg.end(), funcs);
    for_each(v5.begin(), v5.end(), funcs);
    for_each(v.begin(), v.end(), funci);

    return 0;
}

刚学练的STL操作，继续学习。

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