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Full Discussion: While loop problem in C
Top Forums Programming While loop problem in C Post 302736853 by Raj 89 on Wednesday 28th of November 2012 04:47:59 AM
Old 11-28-2012
Quote:
Originally Posted by gabam

Code:
 

    int cont = 1;
 
    while( cont == 1 )   
    {
             printf( "Enter i\n" );
             scanf( "%d", &i );
 
             switch( i )
             {
                    case 1:
                              printf( "1\n" );  
                              cont = 0;
                              break;
                    case 2:
                              printf( "2\n" );
                              cont = 0;
                              break;
                    default:
                              printf( "Invalid value" );
             }
    }

Your program is working perfectly fine.I am not able to understand your logic clearly. What is that you are trying to do. You have normally written the while loop in such a way that it will be exited whenever the value of cont is other than 1. So at first the while loop satisfies and the user provides the input for "i".
But when you provide 1 or 2 for the switch case, the value const will be replaced with zero and then the execution goes to while. This will act as an infinite loop till the value of i tends to be other than 1 r 2 .
but if the value of i is other than 1 or 2, cont will be same and the while loop fails the second time.

---------- Post updated at 03:17 PM ---------- Previous update was at 03:15 PM ----------

Quote:
Originally Posted by gabam

Your code is replaced into this. Well this works better.

Code:
 
int main()
{
    int i = 0;
    int cont = 1;
 
    while( cont == 1 ) 
    {
             printf( "Enter i\n" );
             scanf( "%d", &i );
 
             switch( i )
             {
                    case 1:
                              printf( "1\n" );
                              break;
                    case 2:
                              printf( "2\n" );
                              break;
                    default:
                              printf( "Invalid value" );
                              cont = 0 ;
             }
    }
 
    return 0;
}

Maybe this could help you...
 

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smime_read_cms

SMIME_read_CMS(3SSL)						      OpenSSL						      SMIME_read_CMS(3SSL)

NAME

	SMIME_read_CMS - parse S/MIME message.

SYNOPSIS

	#include <openssl/cms.h>

	CMS_ContentInfo *SMIME_read_CMS(BIO *in, BIO **bcont);

DESCRIPTION

       SMIME_read_CMS() parses a message in S/MIME format.

       in is a BIO to read the message from.

       If cleartext signing is used then the content is saved in a memory bio which is written to *bcont, otherwise *bcont is set to NULL.

       The parsed CMS_ContentInfo structure is returned or NULL if an error occurred.

NOTES

       If *bcont is not NULL then the message is clear text signed. *bcont can then be passed to CMS_verify() with the CMS_DETACHED flag set.

       Otherwise the type of the returned structure can be determined using CMS_get0_type().

       To support future functionality if bcont is not NULL *bcont should be initialized to NULL. For example:

	BIO *cont = NULL;
	CMS_ContentInfo *cms;

	cms = SMIME_read_CMS(in, &cont);

BUGS

       The MIME parser used by SMIME_read_CMS() is somewhat primitive.	While it will handle most S/MIME messages more complex compound formats
       may not work.

       The parser assumes that the CMS_ContentInfo structure is always base64 encoded and will not handle the case where it is in binary format or
       uses quoted printable format.

       The use of a memory BIO to hold the signed content limits the size of message which can be processed due to memory restraints: a streaming
       single pass option should be available.

RETURN VALUES

       SMIME_read_CMS() returns a valid CMS_ContentInfo structure or NULL if an error occurred. The error can be obtained from ERR_get_error(3).

SEE ALSO

       ERR_get_error(3), CMS_type(3) SMIME_read_CMS(3), CMS_sign(3), CMS_verify(3), CMS_encrypt(3) CMS_decrypt(3)

HISTORY

       SMIME_read_CMS() was added to OpenSSL 0.9.8

1.0.0e								    2008-04-10						      SMIME_read_CMS(3SSL)
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