Header file - No such file or directory

[leezeebub]

Hello, im doing the infamous "Hello, World!" project, following Bjarne Stroustrups book "Programming: principles and practice in C++". Although ive managed to get the code working, I had some trouble along the way and would like to know why.

Im using Visual Studio 2010 express.

1. I started by creating a source file and typing #include "C:\Users\leezeebub\Documents\Visual Studio 2010\Projects\std.lib.facilities.h", as described in the book. But when building, this came back with the message "No such file or directory found".

2. I then decided to create the header file within the IDE.
I select the header template and directed it to the folder where the text version is saved. This created a second file "std.lib.facilities", which is missing the .h from the end and is called a "C/C++ Header File". I try Building again but get the same error.

3. Within the IDE I copy and paste the contents of the text file into the header code, and try building again. This time i recieve the message "Some unicode characters in this file could not be saved in the current codepage. Do you want to resave the file as unicode in order to maintain your data?". I click Yes but still get the "No such file or directory" message.

(NOTE: I tried steps 1,2&3 in both the above "Project" directory and a different directory where I had originally saved the Text file)

4. To finally get it working I had to rename the Header file within the IDE to remove the .h from the end, and also edit my source code to remove the .h.

After running the code, the "C/C++ Header File" has been changed again, and is now called a "FACILITIES File".

What am I doing wrong? And what was this Unicode business? According to my book it should have been alot simpler than that.

Thanks in advance for any help!

[leezeebub]

Bump

[coder777]

I would think that's pretty much a missunderstanding. What is this "std.lib.facilities.h" supposed to be?

for a simple "Hello, World!" you need this:

#include <iostream>

using namespace std;

int main()
{
    cout << "Hello world!" << endl;
    return 0;
}

and nothing more (this is generated by Code::Blocks)

[guestgulkan]

coder777 wrote:

I would think that's pretty much a missunderstanding. What is this "std.lib.facilities.h" supposed to be?

This comes up from time to to time.
std_lib_facilities.h is a file that Bjarne provides to use with the samples in the book.
I think you have to go to the website and download.
http://www.stroustrup.com/
http://www.stroustrup.com/Programming/std_lib_facilities.h

I did this previously - and here it is (I assume it hasn't been updated since I downloaded it some time ago)

/*
	simple "Programming: Principles and Practice using C++" course header to
	be used for the first few weeks.
	It provides the most common standard headers (in the global namespace)
	and minimal exception/error support.

	Students: please don't try to understand the details of headers just yet.
	All will be explained. This header is primarily used so that you don't have
	to understand every concept all at once.

	Revised April 25, 2010: simple_error() added
*/

#ifndef H112
#define H112 201004L

#include<iostream>
#include<fstream>
#include<sstream>
#include<cmath>
#include<cstdlib>
#include<string>
#include<list>
#include<vector>
#include<algorithm>
#include<stdexcept>

//------------------------------------------------------------------------------

#ifdef _MSC_VER
#include <hash_map>
using stdext::hash_map;
#else
#include <ext/hash_map>
using __gnu_cxx::hash_map;

namespace __gnu_cxx {

    template<> struct hash<std::string>
    {
        size_t operator()(const std::string& s) const
        {
            return hash<char*>()(s.c_str());
        }
    };

} // of namespace __gnu_cxx
#endif

//------------------------------------------------------------------------------

#define unordered_map hash_map

//------------------------------------------------------------------------------

typedef long Unicode;

//------------------------------------------------------------------------------

using namespace std;

template<class T> string to_string(const T& t)
{
	ostringstream os;
	os << t;
	return os.str();
}

struct Range_error : out_of_range {	// enhanced vector range error reporting
	int index;
	Range_error(int i) :out_of_range("Range error: "+to_string(i)), index(i) { }
};


// trivially range-checked vector (no iterator checking):
template< class T> struct Vector : public std::vector<T> {
	typedef typename std::vector<T>::size_type size_type;

	Vector() { }
	explicit Vector(size_type n) :std::vector<T>(n) {}
	Vector(size_type n, const T& v) :std::vector<T>(n,v) {}
	template <class I>
	Vector(I first, I last) :std::vector<T>(first,last) {}

	T& operator[](unsigned int i) // rather than return at(i);
	{
		if (i<0||this->size()<=i) throw Range_error(i);
		return std::vector<T>::operator[](i);
	}
	const T& operator[](unsigned int i) const
	{
		if (i<0||this->size()<=i) throw Range_error(i);
		return std::vector<T>::operator[](i);
	}
};

// disgusting macro hack to get a range checked vector:
#define vector Vector

// trivially range-checked string (no iterator checking):
struct String : std::string {
	
	String() { }
	String(const char* p) :std::string(p) {}
	String(const string& s) :std::string(s) {}
	template<class S> String(S s) :std::string(s) {}
	String(int sz, char val) :std::string(sz,val) {}
	template<class Iter> String(Iter p1, Iter p2) : std::string(p1,p2) { }

	char& operator[](unsigned int i) // rather than return at(i);
	{
		if (i<0||size()<=i) throw Range_error(i);
		return std::string::operator[](i);
	}

	const char& operator[](unsigned int i) const
	{
		if (i<0||size()<=i) throw Range_error(i);
		return std::string::operator[](i);
	}
};

#ifndef _MSC_VER
namespace __gnu_cxx {

    template<> struct hash<String>
    {
        size_t operator()(const String& s) const
        {
            return hash<std::string>()(s);
        }
    };

} // of namespace __gnu_cxx
#endif


struct Exit : runtime_error {
	Exit(): runtime_error("Exit") {}
};

// error() simply disguises throws:
inline void error(const string& s)
{
	throw runtime_error(s);
}

inline void error(const string& s, const string& s2)
{
	error(s+s2);
}

inline void error(const string& s, int i)
{
	ostringstream os;
	os << s <<": " << i;
	error(os.str());
}

#if _MSC_VER<1500
	// disgusting macro hack to get a range checked string:
	#define string String
	// MS C++ 9.0 have a built-in assert for string range check
	// and uses "std::string" in several places so that macro substitution fails
#endif

template<class T> char* as_bytes(T& i)	// needed for binary I/O
{
	void* addr = &i;	// get the address of the first byte
						// of memory used to store the object
	return static_cast<char*>(addr); // treat that memory as bytes
}


inline void keep_window_open()
{
	cin.clear();
	cout << "Please enter a character to exit\n";
	char ch;
	cin >> ch;
	return;
}

inline void keep_window_open(string s)
{
	if (s=="") return;
	cin.clear();
	cin.ignore(120,'\n');
	for (;;) {
		cout << "Please enter " << s << " to exit\n";
		string ss;
		while (cin >> ss && ss!=s)
			cout << "Please enter " << s << " to exit\n";
		return;
	}
}



// error function to be used (only) until error() is introduced in Chapter 5:
inline void simple_error(string s)	// write ``error: s’’ and exit program
{
	cerr << "error: " << s << '\n';
	keep_window_open();		// for some Windows environments
	exit(1);
}

// make std::min() and std::max() accessible:
#undef min
#undef max

#include<iomanip>
inline ios_base& general(ios_base& b)	// to augment fixed and scientific
{
	b.setf(ios_base::fmtflags(0),ios_base::floatfield);
	return b;
}

// run-time checked narrowing cast (type conversion):
template<class R, class A> R narrow_cast(const A& a)
{
	R r = R(a);
	if (A(r)!=a) error(string("info loss"));
	return r;
}


inline int randint(int max) { return rand()%max; }

inline int randint(int min, int max) { return randint(max-min)+min; }

inline double sqrt(int x) { return sqrt(double(x)); }	// to match C++0x

#endif 

[leezeebub]

Oh yes std.lib.facilities.h is the file guestgulkan posted. I'm not at home to check but it doesn't look like the text has changed.

The book told me to save std.lib.faclities.h as a text file in the above directory.

[leezeebub]

Ahh lunch break!

So basically I've come to the conclusion that std.lib.facilities.h was supposed to simplify things, but has actually just made them more complicated.

In future I will just cut out the middle man and use iostream etc from the start.

Is that a fair assessment?

Thanks for the replies!

[guestgulkan]

I think you might need the std_lib_facilities.h to do some of
the code in Bjarnes book.

But really it is just a header file - there is nothing complicated about using it.