Freeing memory for const char * variable in C++

I have a variable declared as const char *. I have allocated memory for that using malloc(). After using it, I want to free that memory using free(). But I am not able to do that and it gives m开发者_JAVA技巧e error that "Attempting to write to protected memory". How do I free the memory allocated?

Thanks, Rakesh.

---

If you're getting that error then you're doing something wrong and you'll need to post the code so we can figure out what it is. For what it's worth, you can free a const char* as evidenced in the following code, which compiles and executes perfectly:

#include <cstdlib>
int main (void) {
    const char *x = (const char*) malloc (100);
    free ((void*) x);
    return 0;
}

---

After using it

Let me guess, is this what you did?

const char* p = malloc(12);
p = "hello world";           // problem: memory leak
free(p);                     // problem: trying to free static memory

You should replace the second line with strcpy(p, "hello world"); or something similar to get rid of the problem. But since you did not provide any code, I'm not going to delve any further into this matter.