getchar

//getchar
#include<stdio.h>
int main()
{
	//
	char password[20] = { 0 };
	printf("请输入密码:>");
	scanf_s("%s", password);
	printf("请确认密码（Y/N）:>" );
	//清理缓冲区
	//getchar();//处理'\n'
	//清理缓冲区的多个字符
	int tmp = 0;
	while (tmp = getchar()!='\n')
	{
		;
	}
	int ch = getchar();
	if (ch == 'Y')
	{
		printf("确认成功\n");
	}
	else
	{
		printf("确认失败\n");
	}
	return 0;
}