strlen sizeof

//linux, 64bit, gcc, -Wall -Wextra -Wpedantic -Wshadow

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

char a_str[] = "little weasel";
char u_str[] = "žebenkštis";

char *p_str;

int main()
{

    printf( "%s\n", a_str );
    printf("Length of string a_str = %zu\n", strlen(a_str) );
    printf("sizeof of a_str = %zu\n", sizeof a_str );
    printf("sizeof of *a_str = %zu\n", sizeof *a_str );
    printf("sizeof of a_str[0] = %zu\n\n", sizeof a_str[0] );

    printf( "%s\n", u_str );
    printf("Length of string u_str = %zu\n", strlen(u_str) );
    printf("sizeof of u_str = %zu\n", sizeof u_str );
    printf("sizeof of *u_str = %zu\n", sizeof *u_str );
    printf("sizeof of u_str[0] = %zu\n\n", sizeof u_str[0] );

    p_str = malloc( strlen(a_str) + 1 );

    if ( !p_str )
    {
        printf("Error: cannot allocate memory.\n");
        return 1;
    }

    // copies a_str, including the ending null character
    strcpy( p_str, a_str );

    printf( "%s\n", p_str );
    printf("Length of string p_str = %zu\n", strlen(p_str) );
    printf("sizeof of p_str = %zu\n", sizeof p_str );
    printf("sizeof of *p_str = %zu\n", sizeof *p_str );
    printf("sizeof of p_str[0] = %zu\n\n", sizeof p_str[0] );

    free ( p_str );

    return 0;
}

/*
output:

little weasel
Length of string a_str = 13
sizeof of a_str = 14
sizeof of *a_str = 1
sizeof of a_str[0] = 1

žebenkštis
Length of string u_str = 12
sizeof of u_str = 13
sizeof of *u_str = 1
sizeof of u_str[0] = 1

little weasel
Length of string p_str = 13
sizeof of p_str = 8
sizeof of *p_str = 1
sizeof of p_str[0] = 1

*/