【发布时间】:2020-03-09 22:07:55
【问题描述】:
我试图了解我做错了什么。来自键盘的输入在 char 数组范围内... 即使输入是 8 个字符长,它也会引发错误。只要 char 长度为 6 个字符,它就可以正常工作。
这是我的代码(我可以发誓它工作到 1 小时前)
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include "functions.h"
#define SLEN 81
#define FILE_NAME "../database.txt"
void add_members(char *name);
int main(void)
{
char name[SLEN], surname[SLEN], address[SLEN];
unsigned int dob, start_date, end_date;
add_members(&name[SLEN]);
return 0;
}
void add_members(char *name)
{
FILE *file;
if ((file = fopen(FILE_NAME, "a")) == NULL)
{
printf("cant open file %s\n", FILE_NAME);
exit(EXIT_FAILURE);
}
fputs("Insert FIRST NAME: ", stdout);
fgets(name, SLEN, stdin); // appears the problem to be here
check_string(name); // this is defined in another file
fputs(name, file);
printf("Name added to database: %s\n", name);
if (fclose(file) != 0)
printf("error in closing file %s\n", FILE_NAME);
printf("File: %s closed\n", FILE_NAME);
}
【问题讨论】:
-
add_members(&name[SLEN]);-->add_members(name);。前者错误地传递了指向数组末尾后一个字节的指针。
标签: c stack-smash