c++ special variable name

Question

When I create variable I just put the a name for it, but can I create the name of the variable like this:

int var+1= 1;

So basically that should be:

int var1=1;

I know I can't use the + sign to do that but is there way to do it?

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EDIT

int g=1;
string hello+g = "sdljfsdl"; // So hello+g will be hello1

So it is like mixing variable value by another variable value to get new variable name.

Answer 1

It is unlikely to be desirable, but you could use token pasting in the preprocessor:

#define PASTER(x, y) x ## y
#define EVALUATOR(x, y) PASTER(x, y)

int EVALUATOR(var, 1) = 1;

Answer 2

You can do this with macros, but you really shouldn't need dynamic variable names. It sounds like this sort of problem can be solved with an array:

int vars[5];

vars[0] = 3;
vars[1] = 4; 
// etc.

Answer 3

you almost certainly need std::map, or, if available, unordered_map. both will allow you to construct keys however you like and set/get values for those keys e.g.

std::map<string,int mymap;
string fixed = "fixed part";
string var = " 1"; //or construct this from a number
mymap[fixed+var] = 3; //fixed+var == "fixed part 1"