程序代码：

#include<stdio.h>
#include<string.h>
int main()
{
    char c;
    int flag = 1;
    while (flag == 1)
    {
        printf("continue or not(Y/N)?\n");
        getchar();
        c = getchar();
        if (c == 'N' || c == 'n')
            flag = 0;
    }
    if(flag==0)
        printf("%c\n", c);
    return 0;
}