Please Tell me..

[obaid]

Please Tell me.. where i m WrOng..

#include <stdio.h>
#include <stdlib.h>
#include <conio.h>
#include <string.h>

void main(void)
char ch ;
scanf("%C",ch);
printf ("%C", ch);
}

Output of this Code, Should the value of 'ch'.. but this is nOt the output by Complier.. output is empty...


whY!!!!

[tabstop]

Your problem is in the scanf line.

[matsp]

There's also a missing brace at the beginning of main - that may be a typo or some such, but the code as it stands does not compile at all.

--
Mats

[obaid]

yup.. i missing braket..
but what is the problem in ???? "Your problem is in the scanf line."

[tabstop]

Well, you should listen to what your compiler is telling you:

temp.c:6: warning: return type of `main' is not `int'
temp.c: In function `main':
temp.c:8: warning: format argument is not a pointer (arg 2)

[hk_mp5kpdw]

Your argument to scanf must be a pointer to (an address of) ch, not the value of ch which is what ch (by itself) represents. The question then is "how do I get the address of the variable ch?"

[Elysia]

Well, you should listen to what your compiler is telling you:

temp.c:6: warning: return type of `main' is not `int'
temp.c: In function `main':
temp.c:8: warning: format argument is not a pointer (arg 2)

Make those two errors
They shouldn't be treated as warnings since they will not allow your program to run properly (or will invoke undefined behavior)!
-------------------------------------
So those two, you should fix!

[nonoob]

Also, %C should be lowercase %c ???

But it is interesting that so many students are given

main() or some variant... rather than getting started off correctly by their professors

int main(int argc, char **argv)

I don't know why they are taught wrong to begin with. Even if the explanation of that is pending until some later lesson.
(Let's not get into a flame war about unicode argv. LOL). And whether main() truly returns something in all cases, or whether it's recommended to call exit(n) someplace.... ah, more flames.

[master5001]

Yeah well there is no grounds for a unicode flame war, nonoob. A char is too small to hold a unicode character. So no matter how you slice it his format string is incorrect. I doubt he was taught wrong. He was probably given correct code and forgot his first week lesson on how C is case sensitive.

[Elysia]

main()[/b] or some variant... rather than getting started off correctly by their professors

int main(int argc, char** argv)

Besides, both of those are correct ( int main and int main(int, char**) ), so there's no reason to start off with the second directly.

[master5001]

On that note, in C int main() is not the same as int main(void). In C++ they are interchangeable however in C, int main() is the same as saying int main(...). Your compiler will typically make mention of it if you have your warning levels maxed out.

[laserlight]

On that note, in C int main() is not the same as int main(void). In C++ they are interchangeable however in C, int main() is the same as saying int main(...). Your compiler will typically make mention of it if you have your warning levels maxed out.

That's true, if main() were prototyped. When main() is defined, there is no difference between int main() and int main(void) in both C and C++ (other than the fact that one is four characters shorter than the other).

[master5001]

Even in C++ I am always suspicious of people who put int main(). Since that typically means they are not a C programmer. I have more love for C'ers than strict C++'ers. By more love I really mean I am less abusive of their mistakes...

[san_crazy]

scanf() function always put the given value at given address not anywhere else.
here

    scanf("%c",ch);

after giving the input if you expect from scanf() to put that value in ch variable then it gonna not be happen anyway cause scanf() dont know at which location it should put that value.

you have to give the address of ch instead of its name

 scanf("%c",&ch);

where, &ch -- address of ch

[laserlight]

Even in C++ I am always suspicious of people who put int main(). Since that typically means they are not a C programmer. I have more love for C'ers than strict C++'ers. By more love I really mean I am less abusive of their mistakes...

C99 defines main() without void twice. Try finding the "strict C++'ers" on the C99 committee