无法在 C 中释放 const 指针 [英] Unable to free const pointers in C

问题描述

如何释放 const char*?我使用 malloc 分配了新内存，当我试图释放它时，我总是收到错误不兼容的指针类型"

How can I free a const char*? I allocated new memory using malloc, and when I'm trying to free it I always receive the error "incompatible pointer type"

导致这种情况的代码类似于:

The code that causes this is something like:

char* name="Arnold";
const char* str=(const char*)malloc(strlen(name)+1);

free(str); // error here

推荐答案

有几个人发布了正确的答案，但出于某种原因，他们一直在删除它.您需要将其转换为非常量指针；free 采用 void*，而不是 const void*:

Several people have posted the right answer, but they keep deleting it for some reason. You need to cast it to a non-const pointer; free takes a void*, not a const void*:

free((char*)str);

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