What is “null pointer assignment error”?

Question

One of job interview questions on C pointers here is the following: what is null pointer assignment error?

I\'ve googled for a while and don\'t see any reasonab

Answer 1

There are many scenarios where you can see problems. But the key thing is, you did not allocate the memory correctly. The following code would produce Null pointer assignment error message after you run the program. Note: It will compile correctly.

void CopyMessage(char *p)
{
    strcpy(p, "welcome");
}

void main()
{
   char *src;
   CopyMessage(src);
}