How to use standard c++ libraries in xcode?

Question

I have a new empty xcode project. It gives me "No such file or directory" compile error when I try to import some c++ libraries such as <iostream>, <string>, and <map>

What do I have to do to import c++ libraries into xcode for so I can call their functions in objective-c?

You can't call C++ libraries in Objective-C. You can call them in Objective-C++... — Billy ONeal
– Billy ONeal, Commented Mar 1, 2011 at 0:11

Wolfsokta · Accepted Answer · 2011-09-29 05:52:54Z

3

If you are just trying to write C++ code in Xcode instead of calling C++ libraries in your objectiveC project you can create a C++ project. I just created a new project using the "Command Line Tool" template and selected C++ as the language.

I could then add the following lines without the compiler complaining.

#include <iostream>
#include <iomanip>
#include <fstream>
#include <string>

To use items from the std c++ libraries you prefix them with std::

int main (int argc, const char * argv[])
{
    std::cout << "Hello World!";

    return 0;
}

I was actually searching stack overflow for the reason std:: is necessary in Xcode...

answered Sep 29, 2011 at 5:52

Wolfsokta

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1 Comment

K Holmes Over a year ago

at the top of your C++ file, simply add: using namespace std; and that should make it so that you do not need to use std:: on every file.

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