1.流含义

2.流类

3.流对象

4.流对象的函数

举例：

        要求：数据结构中经常需要对齐输出数据，应该怎么做？

1.头文件

#include<iomanip>

2.创建表格头

cout << setiosflags(ios::left) << setw(8) << "姓名"<< setw(8) << "性别"<< setw(8) << "年龄" << endl;

3.输入数据

char name[5][10] = {"王建","张辉","李素","如帅","外库"};
char sex[5][3] = { "男","男","男","女","女" };
int age[5] = { 10,12,15,10,19 };
for (int i = 0;i < 5;i++) {cout << setiosflags(ios::left) << setw(8) << name[i]<< setw(8) << sex[i]<< setw(8) << age[i] << endl;
}

结果：