Scanf 导致 C 程序崩溃 [英] Scanf causes C program to crash

问题描述

这个简单的问题导致我的整个程序在第一次输入时崩溃.如果我删除输入，程序可以正常工作，但是一旦我将 scanf 添加到代码中并输入输入，程序就会崩溃.

This simple issue is causing my entire program to crash during the first input. If I remove the input, the program works fine but once I add scanf into the code and enter the input the program crashes.

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#define MAXEMPS 3


// stub program code
int main (void){
    char answer;

    do
    {

        printf("
 Do you have another(Y/N): ");
        scanf("%c", answer);
    }while(answer == 'Y' || answer == 'y');

    getchar();
    printf("  Press any key ... ");
    return 0;
} // main

推荐答案

必须把变量的地址传给scanf:

You must pass the address of the variable to scanf:

 scanf("%c", &answer);

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