Thread: How do pointers work

I've started to learn pointers, but I am not sure how pointer's operations work. Can you demonstrate on this piece of code how can I use pointers in practice
Thanx in advance!

Code:

#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <string.h>


void main()
{
int i;
int z;
int b = 0;
char ch[250];


printf("%s\n", " Enter line not longer than 250 characters");
gets_s(ch);



for (i=0; i<10; i++)
{
if  (i>4)
{
z = i;
b++;
break;
}
}
printf("%d%c", b, ch[z]);
}

What I have done so far, I've tried to use pointers with the same code, get no errors, but the program suddenly feezes in the execution process

Code:

#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <string.h>


void main()

{
    int i;
    int *i2;
    i2 = &i;

    int z;
    int *z2;
    z2 = &z;



    int b = 0;
    int *b2;
    b2 = &b;




    char ch[250];
    //char *ch2;
    //ch2 = &ch;


    printf("%s\n", " Enter line not longer than 250 characters");
    gets_s(ch);



    for (*i2 = 0; *i2<10; i2++)
    {
        if (*i2>4)
        {
            *z2 = *i2;
            *b2++;
                break;
        }
    }
    printf("%d%c", *b2, ch[*z2]);
}