Create a four-function calculator for fractions so that each fraction is stored internally as a variable of type struct fraction. Here are the formulas for the four arithmetic operations applied to fractions: Addition: a/b + c/d = (a*d + b*c) / (b*d) Subtraction: a/b - c/d = (a*d - b*c) / (b*d) Multiplication: a/b * c/d = (a*c) / (b*d) Division: a/b / c/d = (a*d) / (b*c) The user should type the two fractions and an operator. The program should then display the result and ask whether the user wants to continue.

Create a four-function calculator for fractions so that each fraction is stored internally as a variable of type struct fraction. Here are the formulas for the four arithmetic operations applied to fractions:

Addition:    a/b + c/d = (a*d + b*c) / (b*d)

Subtraction: a/b - c/d = (a*d - b*c) / (b*d)

Multiplication:    a/b * c/d = (a*c) / (b*d)

Division:          a/b / c/d = (a*d) / (b*c)

The user should type the two fractions and an operator. The program should then display the result and ask whether the user wants to continue.

SOLUTION:

#include<iostream.h>

#include<conio.h>

///////////////////////////////////////////////////////////// Define Structures ////////////////////////////////////////////////////////////

struct fraction

            {

int nume,denom;

};

///////////////////////////////////////////////////// Define Structure Variables /////////////////////////////////////////////////////

fraction f[2],rf;

void main()

{

int i;

char dummychar,opr,ch;

do

{

clrscr();

///////////////////////////////////////////////////////////////// Take Input ////////////////////////////////////////////////////////////////////

for(i=0;i<2;i++)

                                    {

                                    cout<<"Enter Fraction "<<i+1<<": ";

cin>>f[i].nume>>dummychar>>f[i].denom;

                                    }

cout<<"Enter Operator: ";       cin>>opr;

////////////////////////////////////////////////////////////////// Calculate rf /////////////////////////////////////////////////////////////////

switch(opr)

                                    {

                                    case '+':

                                                rf.nume=(f[0].nume*f[1].denom)+(f[0].denom*f[1].nume);

                                                rf.denom=f[0].denom*f[1].denom;

                                                break;

                                    case '-':

                                                rf.nume=(f[0].nume*f[1].denom)-(f[0].denom*f[1].nume);

                                                rf.denom=f[0].denom*f[1].denom;

                                                break;

                                    case '*':

                                                rf.nume=f[0].nume*f[1].nume;

                                                rf.denom=f[0].denom*f[1].denom;

                                                break;

                                    case '/':

                                                rf.nume=f[0].nume*f[1].denom;

                                                rf.denom=f[0].denom*f[1].nume;

                                                break;

                                    }

////////////////////////////////////////////////////////////////////// Output /////////////////////////////////////////////////////////////////////

cout<<"\n"<<f[0].nume<<"/"<<f[0].denom<<opr<<f[1].nume<<"/"<<f[1].denom;

cout<<" ="<<rf.nume<<"/"<<rf.denom<<"\n"<<"If you want to continue, press 'y' ";

ch=getch();

}

while(ch=='y' || ch=='Y');

getch();

}

OUTPUT:

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