Thread: classes problem

hi this is my first post and i have a problem with classes
i have made a small health meter
however the choices are not independent
for example if i select choice one and enter the values it works fine
but if i now select choice two it uses the same values of choice one
and just gives an output without letting me enter the values

Here is the source code

Code:

#include <cstdlib>
#include <iostream>

using namespace std;

         ////////////////
class BodyStats
{
      public:
             BodyStats();
            //~BodyStats(); 
            int HeartRate,Age,Height,Bodyweight;
            
             double Bweight,LitersWater,MinWater,RMR;
         
            void FindHeartRate();
            void FindMenRMR();
            void FindFemaleRMR();
            void FindMinimumWater();
            void Stats();
            void Choice();
    /*void FindEnergyExpenditure()
         {
         cout<<"Enter your RMR"<<endl;
         cin<<RMR;
         cout<<
         }*/
         };
         
   BodyStats::BodyStats()
    :  HeartRate(0),
     Age(0),
     Height(0),
     Bodyweight(0)
   {}
  void BodyStats::FindHeartRate()        
    {
      while(Age<=0)
      {
          cout<<"Enter your age";
          cin>>Age;
            if(Age<=0)
               cout<<"Please Enter a valid age"<<endl;
      }
     HeartRate = 220-Age; 
     cout<<"your optimal heart rate is"<<HeartRate;
     
     }
     
  void BodyStats::FindMenRMR()
     {
                   
         while(Bodyweight<=0)
               {
                  cout<<"Enter your Weight(KG)";
                  cin>>Bodyweight;
                if(Bodyweight<=0)
                  cout<<"Please Enter a valid weight"<<endl;
                   cout<<""<<endl;
                }
           while(Height <= 0)
                {
                    cout<<"Enter your Height(CM)";
                    cin>>Height;
                  if(Height <= 0)
                    cout<<"Please Enter a valid height"<<endl;
                     cout<<""<<endl;
                 }
           while(Age <= 0) 
                {              
                       cout<<"Enter your age";
                       cin>>Age;
                    if(Age <= 0)
                        cout<<"Please Enter a valid age"<<endl;
                         cout<<""<<endl;
                }
                       RMR = 66 + (13.7 * Bodyweight)+(5 * Height)-(6.8 * Age);
                       cout<<"Your RMR is = "<<RMR<<endl;
                       
                      
                
       }
   void BodyStats::FindFemaleRMR()
      {
        while(Bodyweight<= 0)
        {
       cout<<"Enter your Weight(KG)"<<endl;
       cin>>Bodyweight;
        if(Bodyweight <= 0 || Bodyweight>=200)
        cout<<"Enter a valid weight"<<endl;
        }
        while(Height<= 0 || Height >= 250 )
        {
         
             cout<<"Enter your Height(CM)"<<""<<endl;
             cin>>Height;
          if (Height<= 0 || Height >= 250)
             cout<<"Enter a valid height"<<endl;
          }
          
          while(Age<=5 || Age>=100) 
          {
       cout<<"Enter your age"<<""<<endl;
       cin>>Age;
          if (Age<=5 || Age>=100)
          cout<<"Enter a valid age"<<endl;
          }
       RMR = 655 + (9.6 * Bodyweight)+(1.8 * Height)-(4.7 * Age);
        
        cout<<" "<<endl;
        
       cout<<"Your RMR is" <<""<<RMR<<endl;
       cout<<" "<<endl;
      
      
       }  
   void BodyStats::FindMinimumWater()
       {
        cout<<"Enter Bodyweight"<<endl;
        cin>>Bodyweight;

        Bweight = Bodyweight * 2.2;
        MinWater = Bweight / 2;
        LitersWater = MinWater/35;
        cout<<"Your optimal water intake should be"<<LitersWater<<"liters"<<endl;
        
        }    
    void BodyStats::Stats()
        {
          cout<<"Calories Per Gram"<<endl;
          cout<<"1 gram fat = 8 calories"<<endl;
          cout<<"1 gram carbohydrate = 4 calories"<<endl;
          cout<<"1 gram protein = 4 calories"<<endl;     
         }    
         
       
int main(int argc, char *argv[])
{
      
      BodyStats Body;
      int choice; 
      while(choice!=6) 
     {
      
      cout<<"1)Men RMR"<<endl;
      cout<<"2)Women RMR"<<endl;
      cout<<"3)Find Optimal Heart Rate"<<endl;
      cout<<"4)Minimum Water"<<endl;
      cout<<"5)Energy Expenditure"<<endl;
      cout<<"6)Quit"<<endl;
    
    
        cout<<"Enter your choice"<<endl;
        cin>>choice;
        
      
      switch(choice)
      {
            case 1:        
               Body.FindMenRMR();
               break;
            case 2:   
                Body.FindFemaleRMR();
               break;
            case 3:   
               Body.FindHeartRate();
                break;
            case 4:   
               Body.FindMinimumWater();
               break; 
            case 5:     
               Body.Stats();
               break;
            case 6:
                 return 0;
              break;   
      }  
    
}

    system("PAUSE");
    return 0;
}

please help out.
Thanks