PreDir2, C++ (gcc)

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//g++  7.4.0
//Preprocessor Directive Example 2
//this code is created by Rezaul Hoque on November 25,2021;contact: jewelmrh@yahoo.com
//note: codes shared by Rezaul Hoque on rextester are not for sale; they are created and shared to facilitate the algorithm learning process; many like Hoque use this platform to practice programming ;Rezaul hopes his contribution helps others to fine tune their learning;

#define DEBUG
#include <iostream>
using namespace std;
#define Head(x) #x 
#ifndef DEBUG
  #define ID(y)\
         { \
            std::cout<<"Right ID!\n";\
          }
#else
  #define ID(y)\
                 if (!(y))\
                 {\
                        std::cout<<" Wrong ID!\n";\
                        std::cout<<" on line : "<<__LINE__;\
                    }

#endif
 int main()
{
int x=1;
int y;
std::cout<<Head(Preprocessor Directive Example#2:);
std::cout<<"\n";

std::cout<<"\nEnter ID:\n";
std::cin>>y;
ID(y==x);
if(y==x)
{
std::cout<<"Right ID!\n";
}
std::cout<<"\n";
return 0;
}

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Compilation time: 0.42 sec, absolute running time: 0.18 sec, cpu time: 0.02 sec, memory peak: 5 Mb, absolute service time: 0,72 sec