Thread: increment and decrement operators

Originally posted by ee0u22ba
The increment and decrement operators can be placed before or after an integer variable. But I need to know the different behaviour of these two operators when they are placed before and after an integer variable, with examples

Try your C++ book on for size eh? Every C++ book covers this. It's exactly like it sounds:

Before increments before the value is used.
After increments afterwards.

Example:

output( c++ ); // passes thevalue of 'c' to output, then increments it

output( ++c ); // increments 'c' and then passes it to output

Not hard at all. Like I said, just look in any C++ book.

Quzah.

Actually, strictly speaking, I think it's more like:

Value = X++;

Code:

int temp = X;
X = X + 1;
Value = temp;

Whereas, Value = ++X;

Code:

X = X + 1;
Value = X;

Not 100% sure, but given that operators mostly if not always act as functions do, I doubt that they're smart enough to return a value and then increment it after (If you find a way of making a function that does this, please tell me! ). That's why I generally prefer ++X... I still could be wrong though, especially with those new-fangled compiler optimizations

Why don't you just write a little program to figure this out yourself?