Id returned 1 exit status

Hi guys. I have the problem of "Id returned 1 exit status"in my program.Here is my code,I couldn't point out the reason for this error.i tried compiling it using turbo c++ and dev c++ and got the same result. Help me if u can...

Code:

---

#include <ctype.h>
#include <stdio.h>
int main(void)
{
char ch;


for(;;) {
ch = getchar();
if(ch == '.') {
break;
}
if(isblank(ch)){
printf("%c is a word separator\n", ch);
}
}


return 0;
}

---

output:
[Linker error]undefined reference to 'isblank'
Id returned 1 exit status

What is 'isblank' ?

Looking at what you're trying to do - you might want to take a look as C functions like 'isdigit', 'isalpha' and the family.

Look at one of the functions and you'll have a basic idea of what you want to do.... in your assignment probably.

You should make sure your code is neatly formatted and indented; something like this:

Code:

---

#include <ctype.h>
#include <stdio.h>

int main(void)
{
    char ch;

    for(;;)
    {
        ch = getchar();
        if(ch == '.')
        {
            break;
        }

        if(isblank(ch))
        {
            printf("%c is a word separator\n", ch);
        }
    }

    return 0;
}

---

I believe "isblank()" was standardized in C99, which I don't think either of your compilers support. You can look into this, or try using a different compiler: C and C++ Compiler Information and Reviews - Cprogramming.com

Otherwise, see if "isspace()" suites your needs instead.

Also, you should be declaring "ch" as an int, not a char, as "getchar()" returns an int (read about EOF in the FAQ to see why) and "isblank()" expects an int argument.

I read isblank() as function to find out blank space in the string. It's header file is <ctype.h>. Except isblank(), i got correct results for other functions like ispunct()-to find punctuation marks and all.

****I declared "ch" as int, but i got the same :"Id returned 1 exit status" as error.

****Thank you for all your help, i used isspace() function instead of isblank() as you suggested. Its working..:):)

Quote:

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Originally Posted by swathi.s

I read isblank() as function to find out blank space in the string. It's header file is <ctype.h>. Except isblank(), i got correct results for ispunct()-to find punctuation marks.

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It probably does not come with your compiler.

It doesn't come with my compiler too.

Quote:

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Originally Posted by swathi.s

I read isblank() as function to find out blank space in the string. It's header file is <ctype.h>. Except isblank(), i got correct results for other functions like ispunct()-to find punctuation marks and all.

---

"isblank()" appears to be a more recent addition to the standard library, which your current compilers likely do not support.

Quote:

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Originally Posted by swathi.s

****Thank you for all your help, i used isspace() function instead of isblank() as you suggested. Its working..:):)

---

You're welcome.

I wouldn't call 1999 "recent". There's an even more recent C standard that's been out for 4 years now! Maybe it's time to upgrade to a compiler that supports at least C99? :p