string problem( programming C )

ellainexx · 08-27-2011, 11:40 PM

hello!
I've asked all of my friends about this problem but nobody knows it.
okay here's the problem, we need to output this:

Enter the date today: July 5 2008

Today is 7 5 08

how can I do that in programming.
Our teacher said, we're gonna use String , strcmp in this problem.. I dont really understand string ..

Hope someone could help!

thanks Godbless.

Nylex · 08-28-2011, 12:34 AM

You need to tell us what exactly it is you don't understand, as well as what you've tried already. If you haven't tried anything, at least tell us how you think you need to go about solving the problem. That way, we can help you with each step and help you learn. It's better than someone just posting the solution for you.

grail · 08-28-2011, 01:03 AM

Well based on so little information and effort on your behalf i would simply say that the last 2 sets of numbers (5 and 08) are obvious and if you had a list of months that are somehow
associated with numbers that you could 'compare' the first 'string' and get the required number.

Wim Sturkenboom · 08-28-2011, 06:59 AM

C does not really know strings; only character arrays.

Assuming the user of the program needs to enter the date

Code:

printf("Enter the date today: ")

To read the user data

Code:

gets(yourbuffer)

or better

Code:

fgets(yourbuffer,sizeofyourbuffer,0)

To split the user date, use strchr or strtok
To compare

Code:

int month;
if(strcmp(month_from_userdata,"July")==0)
{
    month=7;
}

Hope this gets you on the way.

murugesan · 08-28-2011, 11:53 PM

Code:

int month = 0 ;

Detecting The Use Of Uninitialized Variables
http://www.cprogramming.com/debugging/valgrind.html

always check "==0" at the beginning of the condition like:

Code:

	if( 0 == strcmp(month_from_userdata,"July") )
	{
	    month=7;
	}

or

Code:

	if( !strcmp(month_from_userdata,"July") )
	{
	    month=7;
	}

Code:

fgets(yourbuffer,sizeofyourbuffer,0)

/* Check here for return value (handling errors) */
needs to be

Code:

fgets(yourbuffer,sizeofyourbuffer,stdin); /* like on Linux/HP UX */

as the last parameter for stream cannot be 0 which will create
1. core file ("ulimit -c unlimited" before executing a.out)
2. a.exe.stackdump on cygwin

Code:

gets(yourbuffer)

/* Check here for return value (handling errors) */

Wim Sturkenboom · 08-29-2011, 02:00 AM

Thanks for correcting the fgets; was too lazy to check it out.

It's after all just sample code to show the steps

hence no error checking whatsoever.