Converting strings to integers

[personak]

How do I get string thestring to return theinteger? I'll be doing it a lot in a script, so I'd like to create a subroutine.

[wolfgang]

Its quite simple using stringstreams

#include <sstream>
#include <string>

int convert_to_int (const std::string &str)
{
  int x;
  std::ostringstream ss(str);
  ss >> x;
  return x;
}

[Seraphimsan]

use the function atoi

bare in mind that it is in the cstdlib header and takes a char* argument

So when you pass it your string use the string class method String.c_str();

(or in your case thestring.c_str())

[personak]

It says that atoi was not declared in the scope. I assume I have to include something. So far, I've:

#include <iostream>
#include <string> 

What do I have to do?

[Seraphimsan]

As I said it's in the cstdlib header.

you'll include cstdlib.