Passing strings to functions

output.txt

## compiled with gcc -Wall -std=c99 xx.c -o xx -Wextra
## and then run. Produces the following output:

Printing mystring_fixed...
In print_string_fixed_len_array> string = `Fixed len array with (50) elements'
In print_string_pointer> string = `Fixed len array with (50) elements'
Printing mystring_fixed......done

Printing mystring...
In print_string_fixed_len_array> string = `Fixed (unspecified) length array'
In print_string_pointer> string = `Fixed (unspecified) length array'
Printing mystring......done

Printing allocatedstring...
In print_string_fixed_len_array> string = `Allocated len array with 50 elements'
In print_string_pointer> string = `Allocated len array with 50 elements'
Printing allocatedstring......done

passing_strings.c

#include <stdio.h>
#include <stdlib.h>

#define STR_HELPER(x) #x
#define STR(x) STR_HELPER(x)

#define FIXEDLEN     (50)

void print_string_fixed_len_array(char mystring[FIXEDLEN])
{
    fprintf(stderr,"In %s> string = `%s'\n", __FUNCTION__, mystring);
}

void print_string_pointer(char *mystring)
{
    fprintf(stderr,"In %s> string = `%s'\n", __FUNCTION__, mystring);
}


int main(int argc, char **argv)
{
    char mystring_fixed[FIXEDLEN] = "Fixed len array with " STR(FIXEDLEN) " elements";
    char mystring[] = "Fixed (unspecified) length array";
    char *allocatedstring = malloc(FIXEDLEN*sizeof(char));
    if(allocatedstring == NULL) {
        fprintf(stderr,"Error: Could not allocate memory for %d bytes\n", FIXEDLEN);
        return EXIT_FAILURE;
    }
    snprintf(allocatedstring, FIXEDLEN-1, "Allocated len array with %d elements", FIXEDLEN);

    fprintf(stderr,"Printing mystring_fixed...\n");
    print_string_fixed_len_array(mystring_fixed);
    print_string_pointer((char *) &mystring_fixed);
    fprintf(stderr,"Printing mystring_fixed......done\n\n");

    fprintf(stderr,"Printing mystring...\n");
    print_string_fixed_len_array(mystring);
    print_string_pointer((char *) &mystring);
    fprintf(stderr,"Printing mystring......done\n\n");

    fprintf(stderr,"Printing allocatedstring...\n");
    print_string_fixed_len_array(allocatedstring);
    print_string_pointer(allocatedstring);
    fprintf(stderr,"Printing allocatedstring......done\n\n");
    free(allocatedstring);

    return EXIT_SUCCESS;
}