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Jun 26th, 2009

Definitions Some C++ operators

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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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coachHinesfan

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Jun 26th, 2009

Re: Definitions Some C++ operators

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:

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

Tom Gunn

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Jun 26th, 2009

Re: Definitions Some C++ operators

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

C++ Syntax (Toggle Plain Text)
 
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

C++ Syntax (Toggle Plain Text)
 
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.

emarshah

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Jun 27th, 2009

Re: Definitions Some C++ operators

Thank you very much guys !!

coachHinesfan

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