#include using namespace std; class UC { protected: double val1; //initial value double val2; //converted value public: UC(double i=0) { val1=i; } double getconv() { return val2; } virtual void compute() = 0 ; }; //CONVERT miles to km class mile_km : public UC { public: mile_km(double i=0): UC(i) { } void compute() { val2= 1.60934 * val1 ; } }; //Convert ft to cm class ft_cm : public UC { public: ft_cm(double i=0): UC(i) { } void compute() { val2 = 30* val1 ; } }; //CONVERT gallons to ltr class gall_ltr : public UC { public: gall_ltr(double i=0): UC(i) { } void compute() { val2 = 3.78541 * val1 ; } }; //CONVERT fahrenheit to celsius class fah_cel: public UC { public: fah_cel(double i=0): UC(i) { } void compute() { val2 = 5/9*(val1-32); } }; //CONVERT dollars to rupees class dol_rup: public UC { public: dol_rup(double i=0): UC(i) { } void compute() { val2= 72.11 * val1 ; } }; //CONVERT euros to rupees class euro_rup: public UC { public: euro_rup(double i=0): UC(i) { } void compute() { val2= 80.9533 * val1 ; } }; int main() { UC *p ; /* mile_km c11(); ft_cm c12(); gall_ltr c13(); fah_cel c14(); dol_rup c15(); euro_rup c16(); */ while(1) { int ch; double digit; char option; cout<<"\nPlease choose type of conversion:\n" ; cout<<"\t 1.convert miles to km. " ; cout<<"\n\t 2.convert feet to cm. " ; cout<<"\n\t 3.Convert gallons to ltr. " ; cout<<"\n\t 4.Convert fahrenheit to celsius" ; cout<<"\n\t 5.Convert dollars to rupees"; cout<<"\n\t 6.Convert euros to rupees\n " ; cin>> ch ; switch(ch) { case 1: cout<<" miles = ?? " ; cin>>digit; //mile_km c1(digit); //p=&c1; p = new mile_km(digit); p->compute(); cout<<" km = "<<(p->getconv() ) ; break; case 2: cout<<" feet = ?? " ; cin>>digit; //ft_cm c2(digit); //p=&c2; p= new ft_cm(digit); p->compute(); cout<<" cm = "<<(p->getconv() ) ; break; case 3: cout<<" gallons = ?? " ; cin>>digit; //gall_ltr c3(digit); //p=&c3; p=new gall_ltr(digit); p->compute(); cout<<" liter = "<<(p->getconv() ) ; break; case 4: cout<<" fahrenheit = ?? " ; cin>>digit; //fah_cel c4(digit); //p=&c4; p=new fah_cel(digit); p->compute(); cout<<" Celsius = "<<(p->getconv() ) ; break; case 5: cout<<" dollars = ?? " ; cin>>digit; //dol_rup c5(digit); //p=&c5; p=new dol_rup(digit); p->compute(); cout<<" rupees = "<<(p->getconv() ) ; break; case 6: cout<<" euros = ?? " ; cin>>digit; //euro_rup c6(digit); //p=&c6; p=new euro_rup(digit); p->compute(); cout<<" rupees = "<<(p->getconv() ) ; break; } cout<<"\n\nDO you want to continue...?? (Y/N)" ; cin>>option ; if(option=='N' || option=='n') exit(0); } }

small_UnitConverter