這個是用來清空cin緩衝區裡面未讀取的資訊...

例子:

#include <iostream>

using namespace std;

int main () {

char first, second;

cout << "Please, enter a word: ";

first=cin.get();

cin.sync();

cout << "Please, enter another word: ";

second=cin.get();

cout << "The first word began by " << first << endl;

cout << "The second word began by " << second << endl;

return 0;

}

樣例輸入:

you

me

樣例輸出:

The first word began by y

The second word began by m