Define a class and use method that outside the class

 C++ program to define a class and method are defined outside the class definition.

Using the same example that we use to define a class with the method. In this example, class are defined outside to class definition.

Create student class, the class has 3 private attributes Rollnum, name, and percentage and also 3 methods to get name .roll number also write a function that calculates the percentage you are passing marks in that function. Test everything inside main function.

 #include<string>  
 #include<iostream>  
 using namespace std;  
 class student  
 {  
   private:  
   int rollNo;  
   double Percent;  
   string name;  
 public:  
   void GetName(string n)  
   {  
     name=n;  
   }  
   void getRoll(int );  
   double CalPre();  
   void print();  
 };  
 void student::getRoll(int r)  
 {rollNo=r;}  
 double student::CalPre()  
  {  
     int a,b,c,d,e;  
     cout<<"Enter your 5 subject number out of 100 :";  
     cin>>a>>b>>c>>d>>e;  
     Percent=(a+b+c+d+e)/5;  
     return Percent;  
   }  
 void student ::print()  
  {  
     cout<<"rollNo :" <<rollNo<<endl;  
     cout<<name<<endl;  
     cout<<"Percentage of student :"<<Percent<<endl;  
   }  
 int main()  
 {  
   student s1;  
   s1.GetName("Shivam choubey");  
   s1.getRoll(1837);  
   s1.CalPre();  
   s1.print();  
 }  

Enter your 5 subject number out of 100 :55
66
99
78 
88
rollNo :1837
Shivam choubey
Percentage of student :77