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//program to demonstrate example of class student with data members (rollno, name, marks, clas) and contains member functions (showdata), class also contains a default constructor which initializes the data members #include<iostream.h> #include<conio.h> #include<string.h> class student { int rollno; char name[20]; int marks; int clas; public: student() //a default constructor { rollno=10; strcpy(name,"abcdef"); marks=90; clas=11; } void showdata() { cout<<"\nrollno of student is "<<rollno; cout<<"\nname of student is "<<name; cout<<"\nmarks of student are "<<marks; cout<<"\nclass of student is "<<clas; } }; void main() { student ob; //object of class student is created and constructor is called which initialises the data members clrscr(); ob.showdata(); getch(); }