C Programming Homework Help Needed

[David Doerr]

Hi Pat,

Shouldn't your "for" loop start with its index set to 2 rather than 3? Your array size is 3 -- with an index of 0, 1 or 2.

Dave D

[Pat McCarthy]

I just fixed that, but I'm still having the same problem.
As an example, I'll enter 1111 and the error checking appears to work, but then I'll enter 1211 and it will say there is an error with the second digit. This happens for any digit that has a value of 2.

[David Doerr]

Sorry, no, your index is OK, but your array declaration should read

int num[4];

not

int num[3];

[Pat McCarthy]

Thanks Dave! That seems to have taken care of it!
It's been a year since I've written code, so I'm a bit rusty.

[David Doerr]

That C structured programming class seems to be dragging out for quite some time. It might be about time to start in on C++.

[Pat McCarthy]

Originally Posted by David Doerr

That C structured programming class seems to be dragging out for quite some time. It might be about time to start in on C++.

Nah, it's been over multiple classes, just all using some C as a component of them.

[StormRoBoT]

help on palindrome

i have make a program that can trace palindrome number but i need it to loop over and over again till i keyin -1 then only the program terminate


this is the code that i have used:

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

void main()
{
char strsrc[5];
char strtmp[5];

printf("\n Enter a five-digit number ( -1 to end ): "); gets(strsrc);

strcpy(strtmp,strsrc);
strrev(strtmp);

if(strcmp(strsrc,strtmp)==0)
printf("\n %s is a palindrome\n",strsrc);
else
printf("\n %s is not a palindrome\n",strsrc);
}

any one can help?

[Alan Anderson]

Originally Posted by StormRoBoT

i have make a program that can trace palindrome number but i need it to loop over and over again till i keyin -1 then only the program terminate

any one can help?

You want it to loop? Hint: use a while statement that never ends, putting all the things inside it that you want to keep executing over and over.

You want it to end? Hint: use an exit statement, but only execute it when the program is supposed to terminate.

[ShotgunNinja]

What exactly do you mean by "loop"? Do you want it to repeatedly ask for a number, then check it for palindrome-ness (sorry, vocabulary suffered a non-Build season hit ) , or do you want to loop through calculations (a bit daft, but I don't know what the professor/employer expects...), or what?