C Puzzles

[sureshkmit 0]

Thanks for your interest in C programming. Here, you will find a list of interesting C programming questions/puzzles. C is the basic language for all who are in the computer science field. You can post new c questions and puzzles. Please try to avoid the duplicates.
I hope that this will be very interesting and meaningful for "C" programmers.

Lets us start with simple question.

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#include<stdio.h>  int main()  {		  int a=10;		  switch(a)		  {				  case '1':					  printf("ONE\n");					  break;				  case '2':					  printf("TWO\n");					  break;				  defa1ut:					  printf("NONE\n");		  }		  return 0;  }

If you expect "NONE" is the output, u are wrong. Wats the output & How?

[iGuest 3]

If you expect "NONE" is the output, u are wrong. Wats the output & How?C Puzzles

The O/p will be NONE only because a has been declared as 10 before  the loop begins.

And as such the value that would be used would be the one declared.

-reply by Anubhav Baweja

[iGuest 3]

If you expect "NONE" is the output, u are wrong. Wats the output & How?C Puzzles

the structure of switch case is:

switch(a)

{

case 1:printf("oneand");   //not case '1':printf("oneand");

}

-reply by rajender

 

[yordan 10]

If you expect "NONE" is the output, u are wrong. Wats the output & How?

Did you really test your program example?Because the "defa1ut" syntax.
Isn't it a mistyping for "default" ?
In that case I would say that you are strongly faulty.
As a teacher, you have to test what you are teaching us. And if you give us a copy-pastable example, this example has to be correct.
If you are a noob, you should test your cases before posting them.
And if you were a skilled c developer, you should not do such obvious syntax errors.

[FirefoxRocks 0]

I would expect the program to not compile, as there is a spelling mistake in "default".Also, you are trying to compare an int to a char.

[iGuest 3]

for loop in CC Puzzles

StartF=1Sum=0For(j=1;j<=5;j++){For(l=j;l>=1;l--){F=f*lSum=sum+(1/f)}}Output sumEnd

-reply by S.FREEDA

[iGuest 3]

Replying to sureshkmitReplying to sureshkmitBecause the spelling of default is wrong. C considers the word 'defalut' as a label and does not show any error message leaving the output screen blank...

-reply by koushik sarma