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Definitions Some C++ operators

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Join Date: Oct 2008

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konyango

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Definitions Some C++ operators

Jun 26th, 2009

Hello all. I have been reading / practising c++ and through the course of my journey I have been encountering some phrases that I don't understand. The phrases are :

-> Binary operators
-> Unary operators

I have tried to search on google and also on other posts in the forum but I just keep finding them used but I don't understand what exactly they do. I am simply looking for a definition of these terms. Your help will be appreciated.
Thank You.

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Join Date: Jun 2009

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Tom Gunn

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Re: Definitions Some C++ operators

Jun 26th, 2009

A binary operator is an operator like + or / that have two operands, one on each side. A unary operator is an operator that only has one operand:

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 C++ Syntax (Toggle Plain Text) 
a * b // binary
true && false // binary
-1 // unary
!x // unary
a * b // binary
true && false // binary
-1 // unary
!x // unary

-Tommy (For Great Justice!) Gunn

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emarshah

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Re: Definitions Some C++ operators

Jun 26th, 2009

Hi,
Binary means having two operands for doing the operation
while unary have only one operand to do any operation.

suppose you have the following code for binary operation

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int result =0 , op1 = 3, op2= 4;
 
result = op1 + op2;
 
// the value of result will be 7 because '+' is a binary operator
// 'op1' and 'op2' are the two operands
int result =0 , op1 = 3, op2= 4;

result = op1 + op2;

// the value of result will be 7 because '+' is a binary operator
// 'op1' and 'op2' are the two operands

while in the case of unary operator

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int op1 = 10;
 
op1++;
 
// now the value of op1 is 11, because '++' is a unary operator
// it involves only one operator, it adds a 1 to the 'op1' and put
// that result back into 'op1'
int op1 = 10;

op1++;

// now the value of op1 is 11, because '++' is a unary operator
// it involves only one operator, it adds a 1 to the 'op1' and put
// that result back into 'op1'

Last edited by emarshah; Jun 26th, 2009 at 4:59 pm.

Syed Ammar Hassan
" A man is known by his level of Determinism "
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