CyclicExpression Checker, C++ (gcc)

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//g++  7.4.0

//cyclical expression checker
//created by Rezaul Hoque on December 2, 2020;
//contact at : jewelmrh@yahoo.com

//a program to check if an equation is cyclical that means in a 3-variable equation if the 1st replaces the 2nd, the 2nd replaces the 3rd and the 3rd replaces the 1st variable then the result of the equation stays the same.
// read the input , three variables, from the user;
// here we are dealing with three equations; so two results are needed for each equation; one result is for the original equation and the other one for the altered equation; 
// compare the results; if the results are the same then we can confidently conclude the equation is cyclical.

#include <iostream>
using namespace std;
int main ()
{
float a, b,c, res1, res2,res3,res4,res5,res6;
cout<<"Equations are:\n";
cout <<"(1) a*a + b*b+ c*c+ a*c+ b*c+ c*a\n";
cout<<"(2) a*a - b*b+ c*c\n";
cout <<"(3) a/b+ b/c + c/a\n";
cout<<endl;
res1=a*a + b*b+ c*c+ a*c+ b*c+ c*a;
res2=b*b+ c*c+ a*a+b*c+c*a+ a*c;
res3 = a*a - b*b+ c*c;
res4= b*b- c*c+a*a;
res5= a/b+ b/c + c/a;
res6= b/c + c/a + a/b;
cout <<" Enter three integers : \n";
cin>>a>>b>>c;
if(res1==res2) 
  cout<<" a*a + b*b+ c*c+ a*c+ b*c+ c*a is cyclical.\n";
else 
  cout<<" a*a + b*b+ c*c+ a*c+ b*c+ c*a is not cyclical.\n";
if(res3==res4) 
cout<<"a*a - b*b+ c*c is cyclical.\n";
else 
    cout<<"a*a - b*b+ c*c is not cyclical.\n";
if(res5==res6) 
 cout<<"a/b+ b/c + c/a is cyclical.\n";
else 
  cout<<"a/b+ b/c + c/a is not cyclical.\n";
return 0;
}

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Compilation time: 0.64 sec, absolute running time: 0.18 sec, cpu time: 0.01 sec, memory peak: 5 Mb, absolute service time: 0,98 sec