if (x && y || z)

[Noobie]

if I have something like

'm'==command[0] && 'u'==command[1] || 's'==command[2]

how does it work? Can I use both && and || together and if so what does it mean? Does it mean (this AND that) OR that or this (AND that OR that)

[quzah]

Sure you can use it. You just have to pay attention to presidence, or do the smart thing and use parenthesis to state exactly what you mean.

Quzah.

[Munkey01]

if (com[0] == 'm' || (com[1] == 'n' && com[2] == 'o'))

If com[0] equals 'm' or if com[1] equals 'n' and com[2] equals 'o,' then do what ever.

[Trauts]

I think he might mean would it be equivilent to this:

( ('m'==command[0] && 'u'==command[1]) || ('m'==command[0] && 's'==command[2]) )

In which case, no.

[major_small]

just remember to use parenthesis when you're using both '&&' and '||'

( XX && YY || ZZ )

// TRUE IF:
// XX AND YY
// OR:
// ZZ

( ( XX && YY ) || ZZ )

// TRUE IF:
// XX AND YY
// OR:
// ZZ

( XX && ( YY || ZZ))

// TRUE IF:
// XX
// AND:
// YY OR ZZ

a great example of how parentesis make a big difference...

[Noobie]

instead of saying

if (!strcmpi("execute command", command))

is there a way to check and see if command includes "execute command" without checking to see that command[0]=e and command [1]=x and so on...or perhaps to check that command[0-14]='execute command' ?

[nvoigt]

Use the strstr function. It should be in your reference.

[Noobie]

I don't know what a reference is, aside from a dictionary or encyclopedia.

[Munkey01]

A nice reference is http://www.cppreference.com/


The specific page for strstr() is here, http://www.cppreference.com/com/stds...ls.html#strstr

[Noobie]

I have no idea what this means

 #include <string.h>
  char *strstr( const char *str1, const char *str2 );

The function strstr() returns a pointer to the first occurrence of str2 in str1, or NULL if no match is found.

[JasonD]

You have to know what pointers are to understand that. The function simply finds the first occurrence of a substring within a larger string. Instead of returning an index to its find, it returns a pointer to it.