strtok - char array versus char pointer [duplicate]

Answer 1

In the second example:

char *string = "hello world";
char *result = strtok(string, " ");

the pointer string is pointing to a string literal, which cannot be modified (as strtok() would like to do).

You could do something along the lines of:

char *string = strdup("hello world");
char *result = strtok(string, " ");

so that string is pointing to a modifiable copy of the literal.