Download Object Oriented Programming Practical File and more Study notes Object Oriented Programming in PDF only on Docsity!
1.[Classes and Objects] Write a program that uses a class where the member functions are
defined inside a class.
//Program to illustrate working of Objects and Class in C++ Programming
#include
using namespace std; class temp {
private: int data1; float data2; public: void int_data(int d){ data1=d; cout<<"Number: "<<data1; } float float_data(){ cout<<"\nEnter data: "; cin>>data2; return data2; } }; int main(){ temp obj1, obj2; obj1.int_data(12); cout<<"You entered "<<obj2.float_data(); return 0; }
Output:
Number: 12 Enter data: 12. You entered: 12.
2. [Classes and Objects] Write a program that uses a class where the member functions
are defined outside a class.
#include using namespace std; class Box {
public: double length; // Length of a box double breadth; // Breadth of a box double height; // Height of a box
// Member functions declaration double getVolume(void); void setLength( double len ); void setBreadth( double bre ); void setHeight( double hei ); };
// Member functions definitions
double Box::getVolume(void) { return length * breadth * height; }
void Box::setLength( double len ) { length = len; }
void Box::setBreadth( double bre ) { breadth = bre; }
void Box::setHeight( double hei ) { height = hei; }
// Main function for the program int main( ) {
Box Box1; // Declare Box1 of type Box Box Box2; // Declare Box2 of type Box double volume = 0.0; // Store the volume of a box here
// box 1 specification Box1.setLength(6.0); Box1.setBreadth(7.0); Box1.setHeight(5.0);
// box 2 specification Box2.setLength(12.0); Box2.setBreadth(13.0); Box2.setHeight(10.0);
// volume of box 1 volume = Box1.getVolume(); cout << "Volume of Box1 : " << volume <<endl;
// volume of box 2 volume = Box2.getVolume(); cout << "Volume of Box2 : " << volume <<endl; return 0; }
Output :
Volume of Box1 : 210 Volume of Box2 : 1560
3. [Constructors and Destructors] Write a program to demonstrate the use of zero
argument and parameterized constructors.
cin>>a>>b; } complex operator+(complex ob) { complex t; t.a=a+ob.a; t.b=b+ob.b; return(t); } complex operator-(complex ob) { complex t; t.a=a-ob.a; t.b=b-ob.b; return(t); } void display() { cout<<a<<"+"<<b<<"i"<<"\n"; } };
void main() { clrscr(); complex obj1,obj2,result,result1;
obj1.getvalue(); obj2.getvalue();
result = obj1+obj2; result1=obj1-obj2;
cout<<"Input Values:\n"; obj1.display(); obj2.display();
cout<<"Result:"; result.display(); result1.display();
getch(); }
Output: Enter the value of Complex Numbers a, b 4 5 Enter the value of Complex Numbers a, b 2 2 Input Values 4 + 5i 2 + 2i Result 6 + 7i
2 + 3i
5. [Typecasting] Write a program to demonstrate the typecasting of basic type to class
type.
//Same as calling fuction from main to class
Class a { Void a() { Cout<<”I am construcot”; } Void show() { Cout<<”I am function”; } }; Void main() { A t; t.show(); }
Output :
I am construcot I am function
6. [Typecasting] Write a program to demonstrate the typecasting of class type to basic
type.
//Program Simple Class Example Program In C++
#include #include<conio.h> using namespace std;
class person {
public: string name; int number; };
int main() { // Object Creation For Class person obj;
//Get Input Values For Object Varibales cout<<"Enter the Name :"; cin>>obj.name;
square(); c=b*a; cout<<"\n\nCube :::\t"<<c; } };
int main() { clrscr(); bottom b1; b1.cube(); getch(); }
OUTPUT
8. [Inheritance] Write a program to demonstrate the multiple inheritance.
PROGRAM:
#include<iostream.h>
#include<conio.h>
class student { protected: int rno,m1,m2; public: void get() { cout<<"Enter the Roll no :"; cin>>rno; cout<<"Enter the two marks :"; cin>>m1>>m2; } }; class sports { protected: int sm; // sm = Sports mark public: void getsm() { cout<<"\nEnter the sports mark :"; cin>>sm;
} };
class statement:public student,public sports
{ int tot,avg; public: void display() { tot=(m1+m2+sm); avg=tot/3; cout<<"\n\n\tRoll No : "<<rno<<"\n\tTotal : "<<tot; cout<<"\n\tAverage : "<<avg; } }; void main() { clrscr(); statement obj; obj.get(); obj.getsm(); obj.display(); getch(); } Output: Enter the Roll no: 100
Enter two marks
90 80
Enter the Sports Mark: 90
Roll No: 100 Total : 260 Average: 86.
9. [Polymorphism] Write a program to demonstrate the runtime polymorphism.
class Base { public:
virtual void display(int i) { cout<<"Base::"<<i; }
};
class Derv: public Base { public:
void display(int j) { cout<<"Derv::"<<j; } };
ofstream outfile; outfile.open("afile.dat");
cout << "Writing to the file" << endl; cout << "Enter your name: "; cin.getline(data, 100);
// write inputted data into the file. outfile << data << endl;
cout << "Enter your age: "; cin >> data; cin.ignore();
// again write inputted data into the file. outfile << data << endl;
// close the opened file. outfile.close();
// open a file in read mode. ifstream infile; infile.open("afile.dat");
cout << "Reading from the file" << endl; infile >> data;
// write the data at the screen. cout << data << endl;
// again read the data from the file and display it. infile >> data; cout << data << endl;
// close the opened file. infile.close();
return 0; } output:
$./a.out Writing to the file Enter your name: Zara Enter your age: 9 Reading from the file Zara 9
The Process of Writing a C++ Program
Step 1: Write the source codes (.cpp) and header files (.h).
Step 2: Pre-process the source codes according to the preprocessor directives. Preprocessor directives begin with a hash sign (#), e.g., #include and #define. They indicate that certain manipulations (such as including another file or replacement of symbols) are to be performed BEFORE compilation.
Step 3: Compile the pre-processed source codes into object codes (.obj, .o).
Step 4: Link the compiled object codes with other object codes and the library object codes (.lib, .a) to produce the executable code (.exe).
Step 5: Load the executable code into computer memory.
Step 6: Run the executable code, with the input to produce the desried output.
