pls help urgently

**rickyspaceguy** · 09-26-2009

Code:

#include<stdio.h>

int main(){
int c,nl;

nl=0;
while((c=getchar())!=EOF)
if(c=='\n')
++nl;
printf("\n%d\n",nl);
return 0;
}

this is an example code frm denis ritchie's book..it accepts ctrl+c as EOF & gives up no no problems..but try changin '\n' to '\t' or ' ' & all hell breaks loose

**rickyspaceguy** · 09-26-2009

Originally Posted by Adak

Of course it has ONE loop, but it doesn't have the logic or loops that would enable it to take in another line of text, without re-starting it.

pls see the above example code i posted..well it does tk it to next line of logic...why???

bcos it does give correct answer albeit not always...thts my actual problem

it w'd b better if u compiled the code...

**quzah** · 09-26-2009

Stop abbreviating the crap out of everything, and form a complete thought. What is it you're actually trying to say? What's your exact problem? Start over, because you're just confusing whatever it was that you were originally trying to say.

Quzah.

**rickyspaceguy** · 09-26-2009

Microsoft Windows [Version 6.0.6000]
Copyright (c) 2006 Microsoft Corporation. All rights reserved.

C:\Users\Ricky>cd c:\MinGW\bin

c:\MinGW\bin>mingw32-gcc c:\MinGW\work\count.c -o c:\MinGW\work\count.out

c:\MinGW\bin>c:\MinGW\work\count.out
cnajnjkfn jbjfdjknfa ^C
c:\MinGW\bin>c:\MinGW\work\count.out
ncnjkjhfa jjjahrhrhrh dkfkjfkdjf
characters:0 space:0 tabs:0 Newlines:0
c:\MinGW\bin>

this is what i get..u see sumtimes the last line is executed other time its not..i can't fig out wat is happening

**rickyspaceguy** · 09-26-2009

pls refer to my original post here

& u may like to see this too..

**quzah** · 09-26-2009

ctrl C isn't EOF. It kills the program. Try ctrl D.

Quzah.

**rickyspaceguy** · 09-26-2009

Originally Posted by quzah

ctrl C isn't EOF. It kills the program. Try ctrl D.

Quzah.

i already know tht..ctrl D is infact used for unix while windows uses ctrl+z... but here gcc compiler doesnt tk ctrl+z or ctrl+d as EOF..i donno y is such a thing happening..btw im using a windows m/c..it must b evident from all the command prompt messages i posted

**BEN10** · 09-26-2009

Originally Posted by rickyspaceguy

Code:

#include<stdio.h>

/* program to calculate no of tabs,spaces,tabs alongwith characters */

int main(){
int c;
int nc,nspc,ntb,nline;

nc=nspc=ntb=nline=0;
c='\0';

while((c=getchar())!=EOF){
++nc;

if(c == ' ')
++nspc;
else if(c=='\t')
++ntb;
else if(c=='\n')
++nline;
else;
}

printf("\ncharacters:%d\tspace:%d\ttabs:%d\tNewlines:%d\t",nc,nspc,ntb,nline);
return 0;
}

i can't find the bug here..i've used a MinGW gcc compiler on a windows machine..

the program compiles correctly...i give it ctrl+c as a end of file indicator..

the programs runs fine the first time..but start giving problems..after wards..sometimes the second last (printf) statement is not executed @ ctrl+c combination...
other times the printf statement contains all 0 zero values ..pls help

Let me explain you clearly:
I copied your code, pasted it then executed it 4 times and got the correct output everytime. I used Ctrl+Z for EOF.
Now do the same thing and tell us the error or problem encountered.

**quzah** · 09-26-2009

Originally Posted by rickyspaceguy

i already know tht..ctrl D is infact used for unix while windows uses ctrl+z...

You're right so far...

but here gcc compiler doesnt tk ctrl+z or ctrl+d as EOF..

Your compiler has nothing to do with what EOF is. It matters what environment you're running the program under.

i donno y is such a thing happening..btw im using a windows m/c..it must b evident from all the command prompt messages i posted

As I've said, CTRL C is stopping your program from ever running. That's why you aren't getting any output.

Quzah.

**Adak** · 09-26-2009

I have indeed compiled your program, and corrected it's mistakes, and posted the corrected program, along with the note that

ctrl+z is EOF in DOS and Windows - not ctrl+c

I've told you, Ben10 has told you, Quzah has told you - all telling you this same thing.

If you don't want to take advice anymore, please stop asking for help. You're taking being stubborn into the realm of the truly world class jackasses.

Stop it, for gawd's sake.

**rickyspaceguy** · 09-26-2009

Originally Posted by BEN10

Let me explain you clearly:
I copied your code, pasted it then executed it 4 times and got the correct output everytime. I used Ctrl+Z for EOF.
Now do the same thing and tell us the error or problem encountered.

thanks ben for the first serious attempt...

this is the command i give @ my windows cmd prompt alongwith the results..can u still find why is this happening??

c:\MinGW\bin>mingw32-gcc c:\MinGW\work\count.c -o c:\MinGW\work\count.out

c:\MinGW\bin>c:\MinGW\work\count.out
nadbhbb jndsjnsjdn nmnjnssdanj ^Z^Z^C
c:\MinGW\bin>c:\MinGW\work\count.out
KDNSLNJBNDJND nsabbsbdjjnsjdn jdsjnjdn
cznnmn^Z^C
c:\MinGW\bin>c:\MinGW\work\count.out
basbgdsja jhjhfdsa
mnsnnnjkn mmsdm^Z^C
c:\MinGW\bin>c:\MinGW\work\count.out
fasjbfbamnbb bbsajbsa
^C
c:\MinGW\bin>c:\MinGW\work\count.out
jbjsann nsjandjndsn kksak
nmjbjj
characters:27 space:3 tabs:0 Newlines:1 ^C
c:\MinGW\bin>c:\MinGW\work\count.out
ndsnhhdshbjb jsajbnsajbdfjb jsabjbfbj
sjfnjfnsjnfs cnnjncj jxzcbjkcjk^Z^C
c:\MinGW\bin>c:\MinGW\work\count.out
sjansjnjns jjaBJKBAb JJDBDjnn nj

characters:33 space:3 tabs:0 Newlines:1
c:\MinGW\bin>c:\MinGW\work\count.out
nndsnd,n njknsankd msnansaknklsam kasnknks
^C
c:\MinGW\bin

^Z is actually ctrl +Z
so u can see the program doesnt take @ctrl+z as EOF
so i tried using ctrl+c..sumtimes it gets executed sumtimes it isnt thts wat bothers me
i use a MinGW compiler with no ide...i donno whether visual studio ide w'd work...

**rickyspaceguy** · 09-26-2009

Originally Posted by Adak

I have indeed compiled your program, and corrected it's mistakes, and posted the corrected program, along with the note that

ctrl+z is EOF in DOS and Windows - not ctrl+c

I've told you, Ben10 has told you, Quzah has told you - all telling you this same thing.

If you don't want to take advice anymore, please stop asking for help. You're taking being stubborn into the realm of the truly world class jackasses.

Stop it, for gawd's sake.

well dear friend i can wish to be accepted as a jackass but not stubborn...im trying to know wat is happening..i use ctrl+z all the time..but the loop won't end so i tried using ctrl+c..

sumtimes the program is taking ctrl+c as EOF but other times as kill command..

thts y i m curious abt wat's actually happening

btw where have u posted the corrected program

**quzah** · 09-26-2009

No it isn't. It's not ever taking CTRL C as EOF. If it were, it would actually be giving you the final printf statement. We've already told you what's wrong. Why on earth should he post the "corrected program" for you? You'd just use it wrong anyway.

I'm done here. You can't teach people who won't listen.

Quzah.

**rickyspaceguy** · 09-26-2009

Originally Posted by quzah

No it isn't. It's not ever taking CTRL C as EOF. If it were, it would actually be giving you the final printf statement. We've already told you what's wrong. Why on earth should he post the "corrected program" for you? You'd just use it wrong anyway.

I'm done here. You can't teach people who won't listen.

Quzah.

hey pls...

c:\MinGW\bin>c:\MinGW\work\count.out
jbjsann nsjandjndsn kksak
nmjbjj
characters:27 space:3 tabs:0 Newlines:1 ^C

this was reached with ctrl+c command...if the process was wholly killed why did the msg got printed

neways it bcoz sumbody said he posted the corrected program i asked 4 it..u r probably not looking at the output i posted....just tk a luk pls..& spit it out tht anger..

**rickyspaceguy** · 09-26-2009

sorry people i at last figured it out...i didnt know tht a return is what makes stdin available to getchar()..
im sorry for all the bad blood

ctrl+z is the EOF in windows...i figured it out how to make it available to my program..thx 4 all the concer