using bit-wise operators in c++

Thu Sep 08, 2011 7:51 am

Code:: main() { int c; c=-2&&3&&1; printf("%d",c); getch(); }

its o/p is 1 how?

Thu Sep 08, 2011 7:18 pm

First i want to remind you of two things :
First ll and && are logical operators , their results can be 1 (true) or 0 (false) , and you are using it on numbers

Code:: http://publib.boulder.ibm.com/infocenter/comphelp/v8v101/index.jsp?topic=/com.ibm.xlcpp8a.doc/language/ref/logande.htm

Second negative numbers in C++ is represented in 2's complement form.
For example (If we assume for simplicity using 1 byte)
-2 ==>-( 00000010)=11111101+1=11111110

using bit-wise operators like and & and | show different results :

Code:: #include<iostream> #include<conio.h> using namespace std; void main() { int c; c=(-2)&(3)&(1); printf("%d",c); getch(); }

11111110 AND 00000011 AND 00000001 = 00000000
the results is 0 not 1 .

using bit-wise operators in c++

using bit-wise operators in c++

Re: how o/p is 1