Pointer_cheatsheet.c

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

void main()
{

    int number = 1;
    int *Pnumber = &number;

    printf("%p adress number \n", Pnumber);
    printf("%d value of variable to which pointer points \n", *Pnumber);
    printf("%p adress Pnumber \n\n", &Pnumber);

    //---------------------------------

    char name[8] = "Jessica";
    //points to first element of name[]and at the same
    //time can address all buckets of the name[]
    //with name[1]...
    char *Pname = name;

    printf("%p Adress of name[0]\n", Pname);
    printf("%p Adress of Pname\n", &Pname);
    printf("%c Value of first char where Pname points to\n", *Pname); //or Pname[0]
    printf("%c value of second char where Pname points to\n\n", Pname[1]);

    //-----------------------------------

    char nameMale[] = "Benjamin";

    //array of char pointers
    char *P_name[5];
    P_name[0] = nameMale;

    printf("%p adress of pointer \n", P_name);
    printf("%p adress of pointer 0\n", &P_name[0]);
    printf("%p adress of pointer 1\n", &P_name[1]);

    printf("%p adress of nameMale[0]\n", &nameMale[0]);
    printf("%s value of variable to which pointer points\n", *P_name);
    printf("%s value of variable to which pointer points\n\n", P_name[0]);

    //----------------------------------------
    char nameFemale[] = "Dorothee";
    char nameFemale2[] = "Sonja";

    char *P_fname[5];
    //array of char pointers pointing to P_fname
    char **PP_fname[2];
    P_fname[0] = nameFemale;
    P_fname[1] = nameFemale2;

    PP_fname[0] = &P_fname[0];
    PP_fname[1] = &P_fname[1];

    printf("%p adress of nameFemale \n", nameFemale);
    printf("%p adress of nameFemale\n", P_fname[0]);
    printf("%p adress of P_fname \n", PP_fname[0]);
    printf("%p adress of PP_fname\n", &PP_fname);
    printf("%p adress of P_fname\n", &P_fname);
    printf("%s value of variable to which pointer of P_fname[0] points\n", *PP_fname[0]);
    printf("%s value of variable to which pointer of P_fname[0] points\n", *PP_fname[1]);
}