first of all, I'm using MS's Visual Studio and using C language.
Recently I need to declare variables with just one same statement which likes a macro.
However as you know, I can declare just one variable which have same name.
for example, this is not possible.
int iVar1;
int iVar1; // this is not possible.
so I thought about macros include __LINE__ , if I can use this predefined macro, I can declare lots of variables via just one macro statement.
But it was difficult to make.
I made macro like this.
#define MY_LINE_VARIABLE int g_iLine##__LINE__##Var = 0;
but after compile, i could get this variable named 'g_iLine_LINE_Var' instead of 'g_iLine123Var'
I want to know that is this possile, and how can i make it.
Furthermore, I need to use __FILE__ macro if possible. but this macro might be changed with string data. so I can not be sure.
Any advice will be helpful.
Thank you for your help in advance.
As @Chris Lutz has rightly said that, there might be a better way to accomplish what you want. Consider asking what you want to achieve.
But if you are just curious, this is the way to do:
#define var(z) int g_iLine##z##var = 0
#define decl(x) var(x)
#define MY_LINE_VARIABLE decl(__LINE__)
MY_LINE_VARIABLE;
MY_LINE_VARIABLE;
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