Check char for a space or for end of array?

Hey,

In my program to turn an infix statement into a postfix or prefix statement, I want to check if a character from my input is equal to a space OR if it is equal to the end of the array.

So basically, I have a char array and Im picking off one char at a time, then comparing it.

So, how do I say:

if(array[i] == ' ') ?

and

if(array[i] == '/0') ?

I dont think those are correct, but I think thats why my program is messing up.

Thanks,
BC

Those check for a space and the null-terminating character of a string. Do you know that there is a '\0' at the end of your input? Also, what if there's a weird character like '\n', is that handled?

Code:

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if(array[i] == ' ' || array[i] == '\0')
{
  /* space or end of array */
}

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It really depends on your loop though,

Code:

---

size_t len = strlen(array);
for(i = 0; i < len; i++)
{
  /* array[i] will never be '\0' */
}

---

Post your code.

Awesome...I dont really have it inside a loop. Im calling a getChar function inside a while loop that just gets next char until it reaches \0.

And btw, there is no such character as '/0'.

Quote:

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Originally Posted by BC2210

Hey,

In my program to turn an infix statement into a postfix or prefix statement, I want to check if a character from my input is equal to a space OR if it is equal to the end of the array.

So basically, I have a char array and Im picking off one char at a time, then comparing it.

So, how do I say:

if(array[i] == ' ') ?

and

if(array[i] == '/0') ?

I dont think those are correct, but I think thats why my program is messing up.

Thanks,
BC

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Code:

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if(array[i] == ' ') ?

*OR*

if(array[i] == '/0') ?

---

or more precisely

Code:

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if ( (array[i] == ' ') || (array[i] == '/0') ) //not tested :O)

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As Elysia already said, '/0' is not a character.

Code:

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if(array[i] == ' ' || array[i] == '\0')

---

Is suffice.

Quote:

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Originally Posted by zacs7

As Elysia already said, '/0' is not a character.

Code:

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if(array[i] == ' ' || array[i] == '\0')

---

Is suffice.

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And if only someone would have posted that before esbo did, he wouldn't have needed to say anything at all.

Oh wait.

Quote:

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Originally Posted by tabstop

And if only someone would have posted that before esbo did, he wouldn't have needed to say anything at all.

Oh wait.

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I posted because he used the word 'and' which was logically incorrect.
I gave an example to illustrate that || means 'or' not 'and'.
I gave up reading the relies half way through reading yours for some reason.
Anyway if I had not posted you would not have needed to say anything at all :O)

Quote:

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Originally Posted by esbo

I gave up reading the relies half way through reading yours for some reason.

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Try reading all replies next time. It might, well... Oh, I don't know, help maybe?