fuzzy logic example

Real Rabbit answered on February 24, 2022 Popularity 10/10 Helpfulness 2/10

answer fuzzy logic example

fuzzy logic example

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#include <iostream>
#include <cmath>
#include <cstring>

const double cdMinimumPrice =0;
const double cdMaximumPrice =70;

using namespace std;

class CFuzzyFunction
{
protected :
	double dLeft, dRight;
	char   cType;
	char*  sName;

public:
	CFuzzyFunction(){};
	virtual ~CFuzzyFunction(){ delete [] sName; sName=NULL;}

	virtual void
	setInterval(double l,
	            double r)
	{dLeft=l; dRight=r;}

        virtual void
	setMiddle( double dL=0,
	           double dR=0)=0;

	virtual void
	setType(char c)
	{ cType=c;}

	virtual void
	setName(const char* s)
	{ 
	  sName = new char[strlen(s)+1];
	  strcpy(sName,s);
	}

	bool
	isDotInInterval(double t)
	{
		if((t>=dLeft)&&(t<=dRight)) return true; else return false;
	}

	char getType(void)const{ return cType;}

        void 
        getName() const
	{
		cout<<sName<<endl;
	}

	virtual double getValue(double t)=0;
};

class CTriangle : public CFuzzyFunction
{
private: 
	double dMiddle;

public:
	void
	setMiddle(double dL, double dR)
	{
		dMiddle=dL;
	}

	double 
	getValue(double t)
	{
		if(t<=dLeft)
			return 0;
		else if(t<dMiddle)
			return (t-dLeft)/(dMiddle-dLeft);
		else if(t==dMiddle)
			return 1.0;
		else if(t<dRight)
		    return (dRight-t)/(dRight-dMiddle);
		else
			return 0;
	}
};

class CTrapezoid : public CFuzzyFunction
{
private:
	double dLeftMiddle, dRightMiddle;

public:
    void
	setMiddle(double dL, double dR) 
	{
		dLeftMiddle=dL; dRightMiddle=dR;
	}

	double 
	getValue(double t)
	{
		if(t<=dLeft)
	       return 0;
		else if(t<dLeftMiddle)
			return (t-dLeft)/(dLeftMiddle-dLeft);
		else if(t<=dRightMiddle)
			return 1.0;
		else if(t<dRight)
			return (dRight-t)/(dRight-dRightMiddle);
		else 
		    return 0;
	}   
};

int
main(void)
{
	CFuzzyFunction *FuzzySet[3];

	FuzzySet[0] = new CTrapezoid;
	FuzzySet[1] = new CTriangle;
	FuzzySet[2] = new CTrapezoid;

	FuzzySet[0]->setInterval(-5,30);
	FuzzySet[0]->setMiddle(0,20);
	FuzzySet[0]->setType('r');
	FuzzySet[0]->setName("low_price");

	FuzzySet[1]->setInterval(25,45);
	FuzzySet[1]->setMiddle(35,35);
	FuzzySet[1]->setType('t');
	FuzzySet[1]->setName("good_price");

	FuzzySet[2]->setInterval(40,75);
	FuzzySet[2]->setMiddle(50,70);
	FuzzySet[2]->setType('r');
	FuzzySet[2]->setName("to_expensive");

	double dValue;
    do
	{
	  cout<<"\nImput the value->"; cin>>dValue;

	  if(dValue<cdMinimumPrice) continue;
	  if(dValue>cdMaximumPrice) continue;

      for(int i=0; i<3; i++)
	  {
		 cout<<"\nThe dot="<<dValue<<endl;
		 if(FuzzySet[i]->isDotInInterval(dValue))
			 cout<<"In the interval";
		 else
			 cout<<"Not in the interval";
		 cout<<endl;

         cout<<"The name of function is"<<endl;
		 FuzzySet[i]->getName();
		 cout<<"and the membership is=";

		 cout<<FuzzySet[i]->getValue(dValue);

	  }

	}
	while(true);

	return EXIT_SUCCESS;
}

Popularity 10/10 Helpfulness 2/10 Language whatever

Source: www.thegeekstuff.com

Tags: fuzzy-logic whatever

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Contributed on Feb 24 2022

Real Rabbit

0 Answers Avg Quality 2/10

fuzzy logic example

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