c program pointer -

i trying programs in c face problem program can 1 tell me problem , want know when in above case if pointer value incremented on write previous value address

#include<stdio.h> int main() {     int a=9,*x;     float b=3.6,*y;     char c='a',*z;     printf("the value %d\n",a);     printf("the value %f\n",b);     printf("the value %c\n",c);     x=&a;     y=&b;     z=&c;     printf("%u\n",a);     printf("%u\n",b);     printf("%u\n",c);     x++;     y++;     z++;     printf("%u\n",a);     printf("%u\n",b);     printf("%u\n",c);     return 0; } 

suppose value got in above program (without increment in pointer value )is 65524 65520 65519 , after increment value of pointer 65526(as 2 increment int ) 65524(as 4 increment float ) 65520(as 1 increment char variable )

then if in case new pointer address overwrite content of previous address , value contained @ new address

first of all, assume calls printf supposed display values of x, y , z, or addresses of a, b, , c, correct? in case need change them to:

printf("%p\n", x); printf("%p\n", y); printf("%p\n", z); 

these take account size of pointer on processor, if different size of int. print address in hexadecimal, more common since addresses can quite large.

and after increment value of pointer 65526(as 2 increment int )

assuming you're on platform int 2 bytes (on modern home pcs int 4 now).

then if in case new pointer address overwrite content of previous address , value contained @ new address ......plz help

you haven't dereferenced of pointers here. memory occupied a, b, , c still untouched; you've done changed x, y, , z pointing to. if dereference 1 of pointers after incrementing it, modifying memory past variable pointed to. if a @ address 65526 decimal , int 2 bytes:

int *x = &a; // x points integer @ "65526" (a) x++;         // x points integer @ "65528", still @ 65526 *x = 5;      // you've modified memory @ addresses 65528 , 65529. 

if 65528 or 65529 contained other important data (like b or c) you've corrupted program's state.