作用:从键盘获取数据
关键字: cin
语法:cin >> 变量
示例:
#include <iostream>
using namespace std;
int main() {
// 1、整型
int a = 0;
cout << "请给整型变量a赋值:" << endl;
cin >> a;
cout << "a = " << a << endl;
// 2、浮点型
double b = 3.1415;
cout << "请给浮点型变量b赋值:" << endl;
cin >> b;
cout << "b = " << b << endl;
// 3、字符型
char c = 'A';
cout << "请给字符型变量c赋值:" << endl;
cin >> c;
cout << "c = " << c << endl;
// 4、字符串型
string str = "hello world";
cout << "请给字符串str赋值:" << endl;
cin >> str;
cout << "str = " << str << endl;
// 5、布尔类型
bool flag = false;
cout << "请给布尔类型赋值:" << endl;
cin >> flag;
cout << "flag = " << flag << endl;
}
更多的cin的知识可以看P3的注解