peek()

#include <iostream>
using namespace std;
//#include <string>

int main()
{
	int no;
	char name[20];
	cout << "input no or name" << endl;
	char ch=cin.peek();
	if (ch>='0' && ch<='9')
	{
		cin >> no;
		cout << "no=" << no << endl;
	} 
	else
	{
		cin.getline(name, 20);
		cout << "name=" << name << endl;
	}
	return 0;	
}