Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: Need help with the Pointers in C
Top Forums Programming Need help with the Pointers in C Post 302336153 by jim mcnamara on Tuesday 21st of July 2009 10:35:20 AM
Old 07-21-2009
output:
Code:
> cc ptest.c
> a.out
 @ is printable
 ô is not printable
 X is printable
 X is printable
 ô is not printable

Code:
> cat ptest.c

void printable(char ch)
{
  printf(" %c %s printable\n", ch, (isprint( (int) ch)) ? "is" : "is not");
}

int main()
{
    char c1 = '@';
    char c2 = 'ô';
    char  *fp="XXô";
    char *p=fp;
    printable(c1);
    printable(c2);
    for(p=fp; *p; p++) printable(*p);
    return 0;
}

Your code has problems.
 

10 More Discussions You Might Find Interesting

1. Programming

Pointers to Arrays

Below is the program i tried to execute...... main() { static int a = {0,1,2,3,4}; static int *p = {a, a+1, a+2, a+3, a+4}; printf (“\n %u %u %d”, p, *p, *(*p) ); } This works, but i wanted to know why both a and *p are declared as "static". If we dont declare a as static... (2 Replies)
Discussion started by: Jayathirtha
2 Replies

2. Programming

Regarding Function and Pointers.

HI, Here is some thing that is puzzling me from a long time. Can some body explain me this with example. The question is :- What is the difference between function pointer and pointer to a function. Where do we actually use the function pointers and pointer to functions. Thanks in... (0 Replies)
Discussion started by: S.Vishwanath
0 Replies

3. Shell Programming and Scripting

functiom pointers

Hi all i wonder about function pointers as i never used them in my C code . could any tell me why and where exactly function pointers come into picture . thanq (1 Reply)
Discussion started by: Raom
1 Replies

4. Programming

pointers

is this a valid c declaration int (*ptr(int *b)); plz explain... (4 Replies)
Discussion started by: areef4u
4 Replies

5. Programming

pointers

Hi I mash with pointers in C. I solve this problem about 5 hours and I don't know how I should continue. void InsertFirst (tList *L, int val) { tElemPtr new; if((new = malloc(sizeof(tElemPtr))) == NULL) Error(); new->data = val; new->ptr = L->frst; L->frst = new;... (2 Replies)
Discussion started by: Milla
2 Replies

6. Programming

restricted pointers

Hi all. I am trying to use restricted pointers to allow the gcc compiler optimize the code, but I have not been able to make it work so far. I am testing with this code: #include <stdlib.h> #include <stdio.h> #include <time.h> #include <sys/time.h> void vecmult(int n, int * restrict a, int... (0 Replies)
Discussion started by: carl.alv
0 Replies

7. UNIX for Advanced & Expert Users

shared pointers

I am new to shared pointer conceot in C++ and hence require some clarification: For example: class A { public: virtual ~A() { } int x; }; typedef boost::shared_ptr<A>... (1 Reply)
Discussion started by: uunniixx
1 Replies

8. Programming

Problem With Pointers

Hi guys. What is the difference between these: 1. int *a; 2. int (*a); (2 Replies)
Discussion started by: majid.merkava
2 Replies

9. Programming

Pointer to pointers

Hi guys, I'm trying to understand pointers in C and made a simple example and I've problems with It. Can someone help? #include <stdio.h> #include <stdlib.h> #include <assert.h> int f1(char **str_); int main(int argc, char **argv) { char *str = NULL; f1(&str); ... (3 Replies)
Discussion started by: pharaoh
3 Replies

10. Programming

Pointers and array

Hello, I read from a book exercise for a challenge. How to print out each letter of char array a by two different pointers pa and ppa in the example? I have tried my code for letter "r" by testing without full understanding as only the first one worked. #include<stdio.h> int main() { char... (17 Replies)
Discussion started by: yifangt
17 Replies

LEARN ABOUT REDHAT

form_requestname

form_requestname(3X)													      form_requestname(3X)

NAME

       form_requestname - handle printable form request names

SYNOPSIS

       #include <form.h>
       const char *form_request_name(int request);
       int form_request_by_name(const char *name);

DESCRIPTION

       The function form_request_name returns the printable name of a form request code.
       The  function  form_request_by_name  searches  in  the name-table for a request with the given name and returns its request code. Otherwise
       E_NO_MATCH is returned.

RETURN VALUE

       form_request_name returns NULL on error and sets errno to E_BAD_ARGUMENT.
       form_request_by_name returns E_NO_MATCH on error.

SEE ALSO

       curses(3X), form(3X).

NOTES

       The header file <form.h> automatically includes the header file <curses.h>.

PORTABILITY

       These routines are specific to ncurses.	They were not supported on Version 7, BSD or System V implementations.	It is recommended that any
       code depending on them be conditioned using NCURSES_VERSION.

AUTHORS

       Juergen Pfeifer.  Manual pages and adaptation for new curses by Eric S. Raymond.

															      form_requestname(3X)
All times are GMT -4. The time now is 03:09 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy