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Tip: Using -- and ++ Operators

Learn why you should try to use only unary operators for incrementing and decrementing variables.


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Try to use only unary operators for incrementing and decrementing variables, because they produce fewer instructions and run faster, as you can see in the following example of code:

#include 
using namespace std;

int main() {
   
   int a,b,c;
   
     a=7;
   a--; 
   b=3+(a--);   
   c=--b*a--; 

   cout         
}

The output should be:



4   8   40


   
Octavia Andreea Anghel is a senior PHP developer currently working as a primary trainer for programming teams that participate at national and international software-development contests. She consults on developing educational projects at a national level. She is a coauthor of the book "XML Technologies--XML in Java" (Albastra, ISBN 978-973-650-210-1), for which she wrote the XML portions. In addition to PHP and XML, she's interested in software architecture, web services, UML, and high-performance unit tests.
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