(5)C++ 循环

一、for循环

    for (int i = 0; i < 5; i++)
    {
        cout << "abc"<< endl;
    }

或

    for (int i = 5; i; i--)
    {
        cout << "abc" << endl;
    }

二、while循环

    int a = 0;
    while (a<10)
    {
        a++;
        cout << a << endl;
    }

三、do while循环

    int a = 0;
    do
    {
        a++;
        cout << a << endl;
    } while (a<5);

四、基于范围 for循环

 对数组或容器类 vector array

    int a[] = { 3,6,8,7 };
    for (int i:a)
    {
        cout << i << endl;
    }

能够修改数组内容

    int a[] = { 3,6,8,7 };
    for (int &i:a)
    {
        cout << i << endl;
    }

循环内初始化

    for (int i: { 3,6,8,7 })
    {
        cout << i << endl;
    }

五、循环和输入

六、嵌套循环和二维数组