Conditional Compilation Macros #ifdef and #ifndef
This video tutorial explains the #ifdef and #ifndef conditional compilation macros in c++ programming.
You are gonna learn what are conditional compilation macros and how to use #ifdef and #ifndef in your program in detail with example.
source code for this tutorial
#include <iostream> #define ANIL 1 using namespace std; int main() { #ifndef ANIL cout << "hey anil"; #else cout << "who r u"; #endif return 0; }