Процедура ShiftLeft3 сдвиг влево трёх чисел

#include <iostream>
using namespace std;
 
void ShiftLeft3(double & A,double & B,double & C)
    {
    double temp = C;
    C = A;
    A = B;
    B = temp;
    }
 
int main()
    {
    double A1 = 2, B1 = 3, C1 = 4;
    double A2 = -1.0, B2 = 2.718281828459045,C2 = 3.1415926535;
 
    ShiftLeft3(A1,B1,C1);
    ShiftLeft3(A2,B2,C2);
 
cout << A1 << ' ' << B1 << ' ' << C1 << endl
        << A2 << ' ' << B2 << ' ' << C2 << endl;
    }

void ShiftLeft3(double & A,double & B,double & C)

#include <iostream>
using namespace std;
 
void ShiftLeft3(double A, double B, double C)
    {
    double temp = C;
    C = A;
    A = B;
    B = temp;
    }
 
int main()
    {double A, B, C;
    cin>>A>>B>>C;
 
cout<<A<<B<<C<<endl;
    }

#include <iostream>
using namespace std;
 
void ShiftLeft3(double& A, double& B, double& C)
{
    double temp = C;
    C = A;
    A = B;
    B = temp;
}
 
int main()
{
   double x,y,z;
   cout<<"A=?";
   cin>>x;
   cout<<"B=?";
   cin>>y;
   cout<<"C=?";
   cin>>z;
   ShiftLeft3(x,y,z);
   cout<<x<<' '<<y<<' '<<z<<endl;
}

#include <iostream>
using namespace std;
 
void ShiftLeft3(double & A,double & B,double & C)
    {
    double temp = C;
    C = A;
    A = B;
    B = temp;
    }
 
int main()
    {
    double A, B, C;
    cin>> A >> B >> C;
    cout<<A<<B<<C<<endl;
 ShiftLeft3(A,B,C);
cout<<A<<B<<C<<endl;
    }