C++ get variable name

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C++

#include <iostream>

using namespace std;
#define getName(VariableName) # VariableName
int print(int num)
{
    std::cout<<getName(num)<<": {"<<num<<"}"<<std::endl; 
}
int main()
{
  int  mynum;
    std::cout<<"enter number->"<<std::endl;
    std::cin>>mynum;
    print(mynum);
   
}

What I have tried:

i got output:

enter number->
5
num: {5}

but i need:

mynum: {5}

Posted 28-Oct-20 17:13pm

Gautam Naresh

Updated 29-Oct-20 7:06am

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Rick York · Accepted Answer · 2020-10-28T18:04:00

You are calling the macro like this : getName(num), so it can not possibly display mynum. I had a similar problem and I did something like this :

#define printValue( val )   print( val, # val )

int print( int num, const char * name )
{
    std::cout << name << ": {" << num << "}" << std::endl; 
}

int main()
{
    int mynum;
    std::cout << "enter number->" << std::endl;
    std::cin >> mynum;
    printValue( mynum );
}