在C中返回字符串的正确方法 [英] Proper way to return a string in C

问题描述

我有以下代码:

char* get_address_string(PACKAGE* pkg){
    char *c;
    sprintf(c, "%02x:%02x:%02x:%02x:%02x:%02x", pkg->address[0], pkg->address[1], 
        pkg->address[2], pkg->address[3], pkg->address[4], pkg->address[5]);
    return c;
}

代码工作正常.但是，我知道这不是在C中返回字符串的正确方法.我收到警告在此函数中未初始化使用c".

The code works fine. However, I know this is not the proper way to return a string in C. I am receiving the warning "c is used uninitialized in this function".

用C编写此函数的正确方法是什么?

What is the proper way to write this function in C?

推荐答案

c是指针，但未分配内存.返回值确定，这就是在C语言中可以完成的操作.

c is a pointer, but no memory is allocated. The return value is ok, that's how it can be done in C.

但是您需要分配内存.

这篇关于在C中返回字符串的正确方法的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！