how to use the constant variable's name as variable?

[zl2k]

hi, there,

Well, the subject looks fuzzy but here is what I want to do but don't
know how.

Suppose I have

const int John = 123456789;
const int Bill = 111222333;
....

now I have a function

void function(string s){
// s is of "John" or "Bill" or ... and I want to print the number
associated with the name.
// however, I don't want to do if else
}

Thanks a lot.

zl2k

 

[Ian Collins]

hi, there,

Well, the subject looks fuzzy but here is what I want to do but don't
know how.

Suppose I have

const int John = 123456789;
const int Bill = 111222333;
....

now I have a function

void function(string s){
// s is of "John" or "Bill" or ... and I want to print the number
associated with the name.
// however, I don't want to do if else
}

You'll have to store the name somewhere and look it up. C++ doesn't do
reflection.

 

[Saeed Amrollahi]

hi, there,

Well, the subject looks fuzzy but here is what I want to do but don't
know how.

Suppose I have

const int John = 123456789;
const int Bill = 111222333;
...

now I have a function

void function(string s){
   // s is of "John" or "Bill" or ... and I want to print the number
associated with the name.
   // however, I don't want to do if else

}

Thanks a lot.

zl2k

The name of variables are source code entities, not compile-time or
run-time things.
You can use something like that:
map<std::string, int> m;
m["John"] = 123456789;
m["Bill"] = 111222333;
or with C++0x:
map<std::string, int> m = { {"John", 123456789}, {"Bill",
111222333} };

Regards,
-- Saeed Amrollahi

 

[zl2k]

hi, there,

Well, the subject looks fuzzy but here is what I want to do but don't
know how.

Suppose I have

const int John = 123456789;
const int Bill = 111222333;
...

now I have a function

void function(string s){
   // s is of "John" or "Bill" or ... and I want to print the number
associated with the name.
   // however, I don't want to do if else

Thanks a lot.

zl2k

The name of variables are source code entities, not compile-time or
run-time things.
You can use something like that:
  map<std::string, int> m;
  m["John"] = 123456789;
  m["Bill"] = 111222333;
or with C++0x:
  map<std::string, int> m = { {"John", 123456789}, {"Bill",
111222333} };

Regards,
  -- Saeed Amrollahi

Thanks, got that.