Saving IF senteces
Hello everyone, I am following the Tips about C++ and I dont understand the tip, to avoid the use of the IF clausule, concretly the 2nd example:
The operator & is to access to memory isn't? Can you explain me how is use it here?Code:Method 2: ========= int main() { int no; scanf( \"%d\", &no ); no&1 ? printf(\"odd\"):printf(\"Even\"); }
Thanks you very much.
David.
The & operator is a binary operation in this example, and it's a quicker modulus operation (remainder is how you determine even/odd - % operator).
http://en.wikipedia.org/wiki/Bit_manipulation
The ? : is a ternary operation, and it's short-form for if/else statement (true/false).
http://en.wikipedia.org/wiki/Conditional_operator
Warning: Have doubt in anything I post.
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That doesn't compile. You don't put a backslash before a double-quote except where you're embedding that double-quote into the string.Originally Posted by dayerman
However don't use ?: as a whole is statement anyway. Just use it for part of an expression that could be this or that:This avoids duplication.Code:printf(no&1 ? "odd" : "Even");
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Linus Torvalds: "But it clearly is the only right way. The fact that everybody else does it some other way only means that they are wrong"
What kind of stupid "tips" are those? "How to write unreadable code"?I am following the Tips about C++ and I dont understand the tip, to avoid the use of the IF clausule,
All the buzzt!
CornedBee
"There is not now, nor has there ever been, nor will there ever be, any programming language in which it is the least bit difficult to write bad code."
- Flon's Law
I was going to ask the same thing. This is another case of 'clever tricks' without really giving a good understanding of how it works or in what cases it's really useful in.
