Four function calculator

Program for Four Function Calculator

#include <iostream.h>

#include <conio.h>

int main()

{

float a,b,c,d,e;

char op,option;
   
cout<<"Enter value of a= ";

cin>>a;

cout<<"Enter value of b= ";

cin>>b;

cout<&lt;"Enter value of c= ";

cin>>c;

cout<&lt;"Enter value of d= ";

cin>>d;

cout<<"First Fraction="<<a<&lt;"/"<&lt;b;

cout<<"\nSecond Fraction="<&lt;c<&lt"/"<&lt;d;

cout<<"\nEnter operator= ";

cin>>op;

switch(op)

{

case '+':

cout<&lt;"Formula= (a/b)+(c/d)= (a*d +b*d)/b*c";

e=(a*d+b*d)/(b*c);

cout<<"\nAnswer= "<&lte;

break;

case '-':

cout<<"Formula= (a/b)-(c/d)= (a*d -b*d)/b*c";

e=(a*d-b*d)/(b*c);

cout<<endl<<"Answer= "<&lt;e;

break;

case '*':

cout<&lt;"Formula= (a/b)*(c/d)= (a*c /b*d)";

e=((a*c)/(b*d));

cout<&lt;endl<&lt;"Answer= "<<e;

break;

case '/':

cout<<"Formula= (a/b)/(c/d)= (a*d/b*c)";

e=((a*d)/(b*c));

cout<<endl<&lt;"Answer= "<&lt;e;

break;

default:

("Unknown Operator");

}
       
getch();   
  
return 0;
}