GP32 Pinkspiders N00b C Help :)

[PinkSpider]

Anyways im trying to do a while loop. Ive done them in other languages (VB+Pascal) and I probably did them in Java hehe.

Anyways I have a string and in the tutorial its simple comparing of an integer which is easy. I wanna make it so if a string is blank (="") then it does it again.

In VB it would go: (omg its so long since I did this lol)

while x = ""

do

I think

 

[ReVaX]

while( !strcmp( x, "" ) ) {
...
}

or

while( x[0] == '\0' ) {
...
}

 

[PinkSpider]

Thx. Will play with these

 

[dieu666]

In C when you do a comparison the bloc of instructions will be executed if the bool value between () is different of 0 (so, if it is true) and when you don't do any comparison it automatically compare with '\0' which in fact refers to "" like '\t' to tabulations, '\n' to nextline,etc. And you can also compare your char with the ASCII value of "" which is 0 (without ')

while( x[0]==0 ) {
...
}

or

while( x[0] ) {
...
}

But I'm a noob too so may be i said something that is wrong.

 

[damaki]

But I'm a noob too so may be i said something that is wrong.

No, you're right that's exactly that. BTW the null value of a pointer also equals 0 so it works too with a pointer.

 

[Robster]

Just to be really picky, the end-of-string terminator doesn't always have to be zero, but the char '\0' is guaranteed to be the end-of-string terminator. So ReVaX's example of

while( x[0] == '\0' ) {
...
}

is technically the most correct solution.

The terminator would only change if you changed system or compiler, and nowadays it's pretty much universal to use zero, so in reality it makes no difference but just in case, it's best to do The Right Thing (tm)

 

[SvOlli]

Using the array is more the Pascal approach.

In C I'd rather to with pointers:

while(*x)
{
}

Just my 2c

Greetings,
SvOlli

 

[damaki]

That's totally off-topic but I'm just too curious. Who's the cutie in your avatar, PinkSpider?

 

[Dozer]

That's totally off-topic but I'm just too curious. Who's the cutie in your avatar, PinkSpider?

It's a bloke h34r:.

 

[damaki]

Oh hell, I was trapped by an androgyne. h34r:

 

[PinkSpider]

Hahaha its a guy (whos now dead called hide)