how to return a string array from a function

Question

char * myFunction () {

    char sub_str[10][20]; 
    return sub_str;

} 

void main () {

    char *str;
    str = myFunction();

}

error:return

Answer 1

Reason:
you need the return type to be char(*)[20]. But even in this case you don't want to return a pointer to a local object from the function.
Do:
Use malloc to allocate sub_str, and return char**.