POINTERS

#include<stdio.h>

int main()

{

int a,i=4;//due to int,stack segment provide us a block of 4 byte memory for 32 bit fr local variable

int *j,*k;

j=&i;

printf("\nj=%d",j);

k=j+3;//in address form k will represent 12 byt diff frm j...add of k is 12 byte more than j...

printf("\nk=%d",k);

a=k-j;//now a is simple variable so contains value not address as k is 12 byte more than j ...but...a will not show diff.

*b/w k-j 12 byte....value of a will be 3 bcz k is at address 3 blocks more than j

printf("a=%d\n",a);

return 0;

}

//fibonacci series using pointers //fibonaci series means start frm whole no.0 & 1 then every new value is added to previous one to form a new value ...here series formed is 0,1,1,2,3,5,8,13,21....so on.......

#include<stdio.h>

int fibo(int*,int*);

int fibo(int *x,int* y)

{

int temp;

temp=*x+*y;//old & new value r added & put into temp variable

*x=*y;//new value is replaced with old value

*y=temp;// adition of two values is put into new value *y

//printf(" %d %d",x,y);

//fibo(x,y);

return 0;

}

int main()

{

static int a=0,b=1,i=0;

printf("%d",a);

for(i=0;i<=5;i++)

{

fibo(&a,&b);//address of a & b is pased to pointers to operate on these values using function

printf("\n%d ",b);

}

return 0;

}

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