Lesson 36 Source Code

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Lesson 36 Video

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Lesson 36: Introduction to functions

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Basic use of a function

All functions (except of the type void) require a return value. Functions can be called by the user anytime.. In this lesson, the return value is useless.
#include <iostream>
using namespace std;

bool FirstFunction()
{
	cout << "iam4eversmart88\nWelcome to the world of functions";
	return true;
}

int main()
{
	FirstFunction();
	cin.get();
	return 0;
}

#include <iostream>
using namespace std;

bool FirstFunction()
{
	cout << "iam4eversmart88\nWelcome to the world of functions";
	return true;
}

int main()
{
	cout << "Hello World\n";
	FirstFunction();
	cout << endl << "something else";
	cin.get();
	return 0;
}



Different examples of functions

Go ahead and copy and paste these pieces of code and compile them for extra practice

#include <iostream>
using namespace std;

char AnotherFunction()
{
	cout << "This one is different";
	return 'G';
}

int main()
{
	AnotherFunction();
	cin.get();
	return 0;
}

#include <iostream>
using namespace std;

double Twice()
{
	cout << "This one is different";
	return 2.718;
}

int main()
{
	Twice();
	cout << endl << "and again...\n";
	Twice();
	cin.get();
	return 0;
}

#include <iostream>
using namespace std;

int Running()
{
	cout << "i will just repeat myself...\n";
	return 7;
}

int main()
{
	for(int a=0;a<5;a++)
	{
		Running();
	}
	cin.get();
	return 0;
}