C程序员的C++指导书（3）

可以使用cout<< 和cin>>实现从键盘输入和输出到屏幕。

using namespace std;
#include <iostream>

int main()
{
   int a;                    // a is an integer variable
   char s [100];             // s points to a string of max 99 characters

   cout << "This is a sample program." << endl;

   cout << endl;             // Just a line feed (end of line)

   cout << "Type your age : ";
   cin >> a;

   cout << "Type your name: ";
   cin >> s;

   cout << endl;

   cout << "Hello " << s << " you're " << a << " old." << endl;
   cout << endl << endl << "Bye!" << endl;

   return 0;
}