Question

Here’s my code…

char* m1;
char* m2 = "sth";
strcpy(m1, m2);

That code threw run-time errors, so I tried…

char m1[];
char m2[] = "sth"; 

That can run with no errors. However, I want to use…

char* s

What sould I do?

Answer 1

Problem is you are not allocating any memory to store the result of the strcpy method. You need:

char* m1 = (char *) malloc(sizeof(char) * 4) /* 4 being the size of 3 chars + trailing \0 */
char* m2 = "sth";

Than you can do the strcpy

And in the end you have to free any dynamically allocated memory a.g.

free(m1)

m2 is allocated statically and doesn’t has to be freed.