Im trying to learn C++

[Evan]

through the last week ive been trying to learn C++.

I want to list all the things that I know so far about operators
and see if they are true..

I have a question at the end to


C++ Operators
---------------------------------

==         Equal to
&&         And
|            Or
<<         And 4 strings? Only with the COut, and CIn ?

As for a binary comparisons...

int var = 2;
If(var && 0x002) {var++}

I dont understand why that arg returns true

Little help???

Thanks!

[markman]

Im pretty sure that since 2 and 0x002 is not equal to 0, its true (nonzero is true).
Also, << is a bitwise operator. Look at "Thinking in C++" (free ebook) and it explains it well. It is overloaded in cin and cout (means that they reassigned different functions to the operators)

[Evan]

I relized now that theres all of these operators...

&&
==
||
&
=
|
^
%
<<

Whats the difference between using a | and ||?

[parksie]

| is bitwise, || is logical. For example:

3 | 1 = 3
3 || 1 = true

[Aerials]

Originally posted by parksie
| is bitwise, || is logical. For example:

3 | 1 = 3
3 || 1 = true

for basic stuff ull want ||

[CornedBee]

All numbers are represented in memory as a chain of bits (duh!). Using the bitwise operators you can modifiy those bits in some interesting ways.
Let's have the numbers 12 (1100) and 10 (1010). The bitwise operators act on the single bits of those numbers.
a) bitwise logical operators: &, |, ^
They perform the same thing as their normal counterparts, but for every single bit:
1100 & 1010 -> bitwise and
[code]
1100
&&&&
1010
----
1000
[code]
1100 | 1010 -> bitwise or

1100
||||
1010
----
1110

^1100 -> bitwise not
=0011

b) bitshift: <<, >>
shifts the bits of a number to the left or right
00001100 (12) << 3 =
01100000 (96)

01010000 (80) >> 3 =
00001010 (10)

Those operators are mainly for advanced use: optimizing and bit-fields.