program to find out the greatest number among four numbers and also it should show whether there are two or three equal numbers,

Question

The User will enter the numbers

Answer 1

how about for equals?

Answer 2

#include <iostream>
using namespace std;

// main function
int main(){

//create object and read the value and store it
double a,b,c,d;
cout<<"Enter number A: ";
cin>>a;
cout<<"Enter number B: ";
cin>>b;
cout<<"Enter number C: ";
cin>>c;
cout<<"Enter number D: ";
cin>>d;
cout<<endl; //space line

// checks the greatest number
if (a > b && a > c && a > d)
{
cout<<"A is the greatest = "<<a<<endl;
}
else if (b>a && b>c && b>d)
{cout<<"B is the greatest = "<<b<<endl;}
else if (c>a && c>b && c>d)
{cout<<"C is the greatest = "<<c<<endl;}
else if (d>a && d>b && d>c)
{cout<<"D is the greatest = "<<d<<endl;}

// checks if all numbers are equal
if (a==b && b==c && c==d){
{cout<<"They are all equal"<<endl;}
}

//check if 3 numbers are equal
else if (a==b && b==c)
{cout<<"A and B and C are Equal = "<<a<<endl;}
else if (a==b && b==d)
{cout<<"A and B and D are Equal = "<<a<<endl;}
else if (a==c && c==d)
{cout<<"A and C and D are Equal = "<<a<<endl;}
else if (b==c && c==d)
{cout<<"B and C and D are Equal = "<<b<<endl;}

//check if 2 numbers are equal
else if (a==b)
{cout<<"A and B are Equal and they are the greatest = "<<a<<endl;}
else if (a==c)
{cout<<"A and C are Equal and they are the greatest = "<<a<<endl;}
else if (a==d)
{cout<<"A and D are Equal and they are the greatest = "<<a<<endl;}
else if (b==c)
{cout<<"B and C are Equal and they are the greatest = "<<b<<endl;}
else if (b==d)
{cout<<"B and D are Equal and they are the greatest = "<<b<<endl;}
else if (c==d)
{cout<<"C and D are Equal and they are the greatest = "<<c<<endl;}

return 0;
}