once again i struck with pointers

6 posts · originally from https://geek.digit.in/community/threads/once-again-i-struck-with-pointers.165695/

#include <stdio.h>

#include <math.h>

main()

{

float x,y;

long int i, j, m[6], *k[5] ;

char *letter, *course[3], name [ ] = "I I T Madras";

course[0]="Numerical Methods";

course[1]=" and Programming";

printf ("\n%s %s\n ", course[0], course[1]) ;

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

m=3*i;

k[0]=&m[1];

k[3]=&m[3];

j=k[3] - k[0];

printf ("\n%d %d %d %d\n ", j, *k, *(k[0]+1), *k[3]) ;

}

i compile this program in a gcc compiler,in this program i struck at the last line that on printing *k as %d it needs to print the first element of the array (ie.. 0) instead it is displaying an address..please help me to solve this .....

First of all, this won't work

Code:

char *letter, *course[3], name [ ] = "I I T Madras";

course[0]="Numerical Methods";

course[1]=" and Programming";

Code:

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

m[i]=3*i;

You never entered the values in m?

@windows i have entered the values in m through the for loop.
and also its working.

long int i, j, m[6], *k[5] ;

In this you are declaring k as array of size 5 of pointer to long int.

So, each element of k is pointer to long int. That's exactly what you are getting.

side tip:
If you are doubtful about data types you may try this site.
cdecl

Code:

printf ("\n%d %d %d %d\n ", j, [COLOR="#FF0000"][B]*[/B][/COLOR]*k, *(k[0]+1), *k[3]) ;

And use %ld instead of %d.

First study about pointers and then do the programming, it would really help you.
As for program
What do you really want to do with this program, elaborate, just writing the program and asking is not a good way. You need to tell what you want to do and state your logic which you know about the particular program.