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Multiple Files

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Monolithic vs Modular one file before

system includes main driver function prototypes function definitions

multiple files now main driver file prototypes header

file(s) functions definition

implementation source file(s)

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#include <iostream>using namespace std;

int main(){    greetings();     return 0;}

void greetings() {    cout << "Hello world!" << endl;    return;}

#ifndef GREET_H#define GREET_H

#include <iostream>using namespace std;

#endif

greet.h

main.cpp

void greetings();

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#include <iostream>#include “greet.h”using namespace std;

int main(){    greetings();     return 0;}

#ifndef GREET_H#define GREET_H

#include <iostream>using namespace std;

void greetings();

#endif

greet.h

main.cpp

#include "greet.h"

greet.cpp

void greetings() {    cout << "Hello world!" << endl;    return;}

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#include <iostream>#include “greet.h”using namespace std;

int main(){    greetings();     return 0;}

#ifndef GREET_H#define GREET_H

#include <iostream>using namespace std;

void greetings();

#endif

greet.h

main.cpp

#include "greet.h"

void greetings() {    cout << "Hello world!" << endl;    return;}

greet.cpp

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Main File comment header system and user includes namespace declaration main function

// Author: Clayton Price// File: main.cpp// This file drives the greet// function.

#include "greet.h"#include <iostream>

using namespace std;

int main(){    greetings(); cout << “Good bye” << endl;    return 0;}

main.cpp

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Main File comment header system and user includes namespace declaration main function

// Author: Clayton Price// File: main.cpp// This file drives the greet// function.

#include "greet.h"#include <iostream>

using namespace std;

int main(){    greetings(); cout << “Good bye” << endl;    return 0;}

main.cpp

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Main File comment header system and user includes namespace declaration main function

// Author: Clayton Price// File: main.cpp// This file drives the greet// function.

#include "greet.h"#include <iostream>

using namespace std;

int main(){    greetings(); cout << “Good bye” << endl;    return 0;}

main.cpp

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Main File comment header system and user includes namespace declaration main function

// Author: Clayton Price// File: main.cpp// This file drives the greet// function.

#include "greet.h"#include <iostream>

using namespace std;

int main(){    greetings(); cout << “Good bye” << endl;    return 0;}

main.cpp

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Main File comment header system and user includes namespace declaration main function

// Author: Clayton Price// File: main.cpp// This file drives the greet// function.

#include "greet.h"#include <iostream>

using namespace std;

int main(){    greetings(); cout << “Good bye” << endl;    return 0;}

main.cpp

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Implementation File comment header user include function definitions

// Author: Clayton Price// File: greet.cpp// This file provides the// greetings functionality

#include "greet.h"

void greetings() {    cout << "Hello world!" << endl;

    return;}

greet.cpp

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Implementation File comment header user include function definitions

// Author: Clayton Price// File: greet.cpp// This file provides the// greetings functionality

#include "greet.h"

void greetings() {    cout << "Hello world!" << endl;

    return;}

greet.cpp

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Implementation File comment header user include function definitions

// Author: Clayton Price// File: greet.cpp// This file provides the// greetings functionality

#include "greet.h"

void greetings() {    cout << "Hello world!" << endl;

    return;}

greet.cpp

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Implementation File comment header user include function definitions

// Author: Clayton Price// File: greet.cpp// This file provides the// greetings functionality

#include "greet.h"

void greetings() {    cout << "Hello world!" << endl;

    return;}

greet.cpp

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Header File comment header preprocessor directives system and user includes namespace declaration function prototypes

// Author: Clayton Price// File: greet.h// This file contains prototype// info for the greet program.//// Function: void greetings();// This function sends a hello// message to the user through// standard output

#ifndef GREET_H#define GREET_H

#include <iostream>using namespace std;

void greetings();

#endif

greet.h

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Header File comment header preprocessor directives system and user includes namespace declaration function prototypes

// Author: Clayton Price// File: greet.h// This file contains prototype// info for the greet program.//// Function: void greetings();// This function sends a hello// message to the user through// standard output

#ifndef GREET_H#define GREET_H

#include <iostream>using namespace std;

void greetings();

#endif

greet.h

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Header File comment header preprocessor directives system and user includes namespace declaration function prototypes

// Author: Clayton Price// File: greet.h// This file contains prototype// info for the greet program.//// Function: void greetings();// This function sends a hello// message to the user through// standard output

#ifndef GREET_H#define GREET_H

#include <iostream>using namespace std;

void greetings();

#endif

greet.h

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Header File comment header preprocessor directives system and user includes namespace declaration function prototypes

// Author: Clayton Price// File: greet.h// This file contains prototype// info for the greet program.//// Function: void greetings();// This function sends a hello// message to the user through// standard output

#ifndef GREET_H#define GREET_H

#include <iostream>using namespace std;

void greetings();

#endif

greet.h

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Header File comment header preprocessor directives system and user includes namespace declaration function prototypes

// Author: Clayton Price// File: greet.h// This file contains prototype// info for the greet program.//// Function: void greetings();// This function sends a hello// message to the user through// standard output

#ifndef GREET_H#define GREET_H

#include <iostream>using namespace std;

void greetings();

#endif

greet.h

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Header File comment header preprocessor directives system and user includes namespace declaration function prototypes

// Author: Clayton Price// File: greet.h// This file contains prototype// info for the greet program.//// Function: void greetings();// This function sends a hello// message to the user through// standard output

#ifndef GREET_H#define GREET_H

#include <iostream>using namespace std;

void greetings();

#endif

greet.h

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Header File comment header preprocessor directives system and user includes namespace declaration function prototypes do not do this!

// Author: Clayton Price// File: greet.h// This file contains prototype// info for the greet program.//// Function: void greetings();// This function sends a hello// message to the user through// standard output

#ifndef GREET_H#define GREET_H

#include <iostream>using namespace std;

#include “greet.cpp”

void greetings();

#endif

greet.h

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Compiling Single File g++ -W –Wall –s –pedantic-errors prog.cpp –o my_prog

Multiple Files by Name g++ -W –Wall –s –pedantic-errors treeFarm.cpp treeFarmFunctions.cpp –o trees

Multiple Files by Wildcard g++ -W –Wall –s –pedantic-errors *.cpp –o trees

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Motivation Security Portability Versitiliy Extendability

#ifndef GREET_H#define GREET_H

#include <iostream>using namespace std;

void greetings();

#endif

greet.h

001010101001101010010100101010100110101001010010101010011010100101001010101001101010010100101010100110101001010010101010011010100101001010101001101010010100101010100110101001010010101010011010100101001010101001101010010100101010100110101001010010101010011010100

Compiled greet.cpp

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End of Session