Jessehk

*starting to blush*
:o

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Zephirus

Wow thanks guys. I haven't had time to read all this since I am at work at the moment. To Dewei, yes, in Algebra we did things like f(x) 2x+3 where you had to find x= a number.

Ill read all this tonight. Thanks for the help everyone.

Zephirus

Ok reading over things... let me try. The syntax will be off cause im new to this but still...



#include <iostream>

int addtwo(int)

int main()
{
cout << "Enter a number" << endl;
int firstnumber;
cin >> firstnumber;
cout << "That number plus 2 is " << addtwo(firstnumber) << endl;
}


int addtwo(int numberinput)
{
return numberinput + 2;
}



Right?

Jimbo

Looks good, although the function prototype should have a semi-colon after it and you should declare the scope of cin, cout, and endl (either prepend std:: to all of them, or put using statements after the #include). By the way, when you post code here, put it in [code] tags and it'll preserve formatting and keep it easier to read for everyone.

DaWei

What Jim said. You wanna join the club and get the free goodies, read the freakin' rules.

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Contributor's Corner: Grumpy on C++ Exceptions DaWei on Pointers

Zephirus

I came here for help, I didn't ask for a childish remark for a 90 year old man on Viagra. Thank you.

Sane

Wow, that was an excellent explanation of functions Jessehk. I'm surprised. If only the tutorial I read when I was first introduced to functions a while back was that well explained. The tutorial I read before seemed to assume I had learned Functions in math before. However, you explained it in a realistic context.

Perhaps you could have explained more about the purpose of void though.

DaWei

The purpose of 'void' is to explicitly state that NOTHING is in play. This precludes trying to decide if something is missing or left out or if its absence is intended.

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Abstraction doesn't make it impossible to write bad code; it makes it possible to write superior code.
Contributor's Corner: Grumpy on C++ Exceptions DaWei on Pointers

Sane

However... I understand that void is generally bad practice. I've learned to return (0); instead of voiding a function. Is there any information I am missing, or different sides to that rule of thumb?

nnxion

Having void functions is fine, but note that almost everything in the C standard library returns whether it failed or succeeded. In languages such as C# this is not the case, that's because if something failed an exception would be raised. Of course if the power went out, the computer is off, and it's likely you'd be able to tell in some kind of manner.

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