c - 使用字符串数组时出现总线错误 10 - C

Question

我有一个程序在选项参数(-r、-d 等)之后获取非选项参数(从命令行)并将每个非选项参数插入到数组中。最多可以输入 25 个非选项参数。

但问题是，当我运行程序时出现“总线错误 10”错误，我不确定为什么。我看过很多有类似问题的帖子，但似乎无法解决我的问题。

代码是:

void loop_namelist(int argc, char *argv[])
{   
int index = 0;
--optind;

char *buff_namelist[25]; //the array that the arguments are stored in
*buff_namelist = malloc(25 * 25); //allocating some memory for the array

while (optind < argc) //loop until no arguments left
{

    strcpy(buff_namelist[index], argv[optind]); 

    ++index; //move to next index in array
}
}

当我这样运行时:

./program -r arg1 arg2

我得到一个总线错误。

Answer 1

添加了一些评论......

char *buff_namelist[25]; //the array that the arguments are stored in

//you don't need to allocate memory for array, but in this case you need to allocate
//memory for each element in array better to do that in for loop
*buff_namelist = malloc(25 * 25); //allocating some memory for the array

while (optind < argc) //loop until no arguments left
{
    //instead of this you should allocate and then copy; or use strdup
    strcpy(buff_namelist[index], argv[optind]); 

    ++index; //move to next index in array
}

---

正确的代码是:

char *buff_namelist[25]; //the array that the arguments are stored in

while (optind < argc && argc < 25) //loop until no arguments left
{

    buff_namelist[index]= strdup(argv[optind]); 

    ++index; //move to next index in array
    optind++; //or somehow update optind
}