C++ PROGRAMS

Add, Int, Float, Double

#include
#include
int add (int a,int b);
float add (float a, float b, float c);
double add (double x, double y);
{
return (a+b)
}
float add (float a, float b, float c);
{
return (a+b+c)
}
double add (double x, double y);
{
return (x+y)
}
void main()
{
clrscr();
cout<
cout<
cout<
getch();
}

CALCULATE INTEREST:

#include(iostream.h)
#include(conio.h)
#include(math.h)

void main()
{
double p, r, t, i, am;
cout<< " Enter principal, rate , time ?";
cin>> p >> r >> t;

i = (p * r* t) / 100;
am = p + i;

cout<< "\n Principal Amt = Rs. " << p;
cout<< "\n Rate = " << r << "%" ;
cout << "\n Time = " << t << "yrs.";
cout<< "\n The Interest Amt = Rs. " << i ;
cout<< "\n The Total Amt = Rs. " << am;
am = pow((p* ( 1 + (r/100)), t);
i = am - p;
cout << "\n The Interest Amt = Rs. " << i;
cout<< "\n The Total Amt = Rs. " << am;


getch();
}

FIND QUOTIENT AND REMINDER ADDING 2 INTEGER:

#include

#include

int main()

{ // Code Copyright @ Coders Guide http://codersguide.org

clrscr();

int x,y,add,quotient,remainder;

cout << “Enter 2 integers: ”;

cin>>x>>y;

add= x+y;

quotient=x/y;

remainder=x-(quotient*y);

cout << “addition of ” << x << ” & ” << y << ” = ” << add << “\n”;

cout << “Quotient of ” << x << ” & ” << y << ” = ” << quotient << “\n”;

cout << “Remainder of ” <<  x << ” & ” << y << ” = ” << remainder << “\n”;

getch();

return 0;

}

FRIEND FUNCTION:

#include
#include
class Cmplx1
{
int real,imagin;
public :
void get()
{
cout<<"\n\n\t ENTER THE REAL PART : ";
cin>>real;
cout<<"\n\n\t ENTER THE IMAGINARY PART : ";
cin>>imagin;
}
friend void sum(Cmplx1,Cmplx1);
};
void sum(Cmplx1 c1,Cmplx1 c2)
{
cout<<"\n\t\tRESULT : ";
cout<<"\n\n\t["<
cout<<" ] + [ "<
cout<<" ] = "<
}
void main()
{
Cmplx1 op1,op2;
clrscr();
cout<<"\n\n\tADDITION OF TWO COMPLEX NUMBERS USING FRIEND FUNCTIONS\n\n";
cout<<"\n\tINPUT\n\n\t\t OPERAND 1";
op1.get();
cout<<"\n\n\t\t OPERAND 2";
op2.get();
sum(op1,op2);
getch();
}

FUNCTION OVERLOADING:

#include
#include
#include
#define pi 3.14
class fn
{
      public:
        void area(int);  //circle
        void area(int,int);  //rectangle
        void area(float ,int,int);  //triangle
};

void fn::area(int a)
{
      cout<<"Area of Circle:"<
}
void fn::area(int a,int b)
{
      cout<<"Area of rectangle:"<
}
void fn::area(float t,int a,int b)
{
      cout<<"Area of triangle:"<
}



void main()
{
     int ch;
     int a,b,r;
     clrscr();
     fn obj;
     cout<<"\n\t\tFunction Overloading";
     cout<<"\n1.Area of Circle\n2.Area of Rectangle\n3.Area of Triangle\n4.Exit\n:”;
     cout<<”Enter your Choice:";
     cin>>ch;

     switch(ch)
     {
              case 1:
                cout<<"Enter Radious of the Circle:";
                cin>>r;
                obj.area(r);
                break;
              case 2:
                cout<<"Enter Sides of the Rectangle:";
                cin>>a>>b;
                obj.area(a,b);
                break;
              case 3:
                cout<<"Enter Sides of the Triangle:";
                cin>>a>>b;
                obj.area(0.5,a,b);
                break;
              case 4:
                exit(0);
     }
getch();
}

HYBRID INHERITANCE:

#include
#include
class student
{
protected:
int roll_number;
public:
void get_number(int a)
{
roll_number=a;
}
void put_number(void)
{
cout<<"Roll No.: "< }
};
class test:public student
{
protected:
float part1, part2;
public:
void get_marks (float x, float y)
{
part1=x;
part2=y;
}
void put_marks(void)
{
cout<<"Marks obtained: \n";
cout<<"Part1="< cout<<"Part2="< }
};
class sports
{
protected:
float score;
public:
void get_score(float s)
{
score=s;
}
void put_score(void)
{
cout<<"Sports wt: "< }
};
class result : public test, public sports
{
float total;
public:
void display(void);
};
void result::display(void)
{
total=part1+part2+score;
put_number();
put_marks();
put_score();
cout<<"Total Score: "<}
int main()
{
result student_1;
student_1.get_number(1234);
student_1.get_marks(27.5,33.0);
student_1.get_score(6.0);
student_1.display();
return 0;
}

INHERITANCE STUDENT CLASS:

#include
#include

using namespace std;

class Person {
public:
      Person(string name, int age) {
            this->name = name;
            this->age = age;
      }
      string getName() {
            return name;
      }
      int getAge() {
            return age;
      }
private:
      string name;
      int age;
};

class Student : public Person
{
public:
      Student(string name, int age, float grade) : Person(name, age) {
            this->grade = grade;
      }
      float getGrade() {
            return grade;
      }
private:
      float grade;
};

int main() {
      cout << "Creating a student Class..." << endl;
      Student johnDoe("XYZ", 30, 5.0);
      cout << "Student's name: " << XYZ.getName() << endl;
      cout << "Student's age: " << XYZ.getAge() << endl;
      cout << "Student's grade: " << XYZ.getGrade() << endl;

      return 0;
}

OVERLOAD STRING CLASS:

#include
#include
using namespace std;
class String
 {
  char *str;
public:
  String();
  String(const char *s);
  String(const String& s);
  void setString(const char *s);
  void setString(const String& s);
  int stringLength() const;
  char *getString() const;
  String& operator=(const String& s);
};
String::String()
{
  str = 0;
}
String::String(const char *s)
{
  str = new char[strlen(s) + 1];
  strcpy(str, s);
}
String::String(const String& s)
{
  str = new char[strlen(s.str) + 1];
  strcpy(str, s.str);
}
void String::setString(const char *s)
{
  setString(String(s));
}
void String::setString(const String& s)
{
  *this = s;
}
int String::stringLength() const
{
  return strlen(str);
}
char *String::getString() const
{
  return str;
}
String& String::operator=(const String& s)
{
  char *temp = new char[strlen(s.str) + 1];
  strcpy(temp, s.str);
  delete [] str;
  str = temp;
  return *this;
}
String operator+(const String& a, const String& b)
{
  char *temp = new char[a.stringLength() + b.stringLength() + 1];
  strcpy(temp, a.getString());
  strcat(temp, b.getString());
  return String(temp);
}
int main()
{
  String s1 = "Hello World";
  String s2;
  s2.setString("This is a string");
  cout<<"string 1 is "<< s1.stringLength() <<" characters long"<
  cout<<"string 1 is "<< s1.getString() <<'\n';
  cout<<"string 2 is "<< s2.getString() << endl <
  cout<<"assign string 2 to string 1"<
  s1.setString(s2);
  cout<<"string 1 is "<< s1.getString() <
  return 0;
}

SUM & AVERAGE of TWO INTEGERS: 

#include

#include

using namespace std;

int main (int argc, char *argv[])

{

    int num[100];

    int n;

    register int i;

    int sum = 0;

    float avg;

    cout << "Enter number of items in array: ";

    cin >> n;

    for (i = 0; i < n; i++)

    {

        cout << "Enter the " << i+1 << "th number: ";

        cin >> num[i];

        sum += num[i];

    }

    avg = (float) sum/n;

    cout << "Sum is " << sum << "\nAnd Average = " << avg;

    getch();

}

VIRTUAL CLASS:

#include

#include

class base

{

    public:

      virtual void show()

      {

                cout<<"\n  Base class show:";

      }

      void display()

      {

              cout<<"\n  Base class display:" ;

      }

};

 

class drive:public base

{

   public:

      void display()

      {

              cout<<"\n  Drive class display:";

      }

      void show()

      {

              cout<<"\n  Drive class show:";

      }

};

 

void main()

{

   clrscr();

   base obj1;

   base *p;

   cout<<"\n\t P points to base:\n"  ;

 

   p=&obj1;

   p->display();

   p->show();

 

   cout<<"\n\n\t P points to drive:\n";

   drive obj2;

   p=&obj2;

   p->display();

   p->show();

   getch();

}