putback.cc

资深C++讲师授课代码

#include <iostream>
using namespace std;

int main()
{
	int n;
	cout << "input an integer:";
	char ch;
	ch = cin.get();
	cout << "ch=" << ch << endl;
	cin.putback(ch);
	cin >> n;
	cout << "n=" << n << endl;
}