#include<iostream>
struct point
{
int x;
int y;
double length (const point& p) const;
};
double point::length (const point& p) const
{
int w = x - p.x;
int h = y - p.y;
return std::sqrt ((w*w) + (h*h));
}
struct rectangle
{
size_t width;
size_t height;
};
struct triangle
{
point A, B, C;
double length_a () const { return B.length (C); }
double length_b () const { return A.length (C); }
double length_c () const { return A.length (B); }
double perimeter () const { return length_a() + length_b() + length_c(); }
};
size_t area (triangle& t)
{
const double s = t.perimeter() / 2;
return std::sqrt (s * (s - t.length_a()) * (s - t.length_b()) * (s - t.length_c()));
}
size_t area (rectangle& r)
{
return r.width * r,height;
}
int main()
{
triangle t {{0,10},{10,0},{0,0}};
rectangle r {10,5};
std::cout << "Triangle area: " << area(t) << std::endl;
std::cout << "Rectangle area: " << area(r) << std::endl;
}
#include<iostream>
class rectangle
{
int width;
int height;
public:
rectangle(int w, int h):width(w),height(h){}
int get_area()const{return(width*height);}
};
int main()
{
rectangle rect(3,5);
std::cout<<"Area = "<<rect.get_area()<<std::endl; // Area = 15
}
#include<iostream>
#include<string>
#include<sstream>
const double& min(const double& a, const double& b) {
return(a<b?a:b);}
const double& max(const double& a, const double& b) {
return(b<a?a:b);}
struct rectangle
{
rectangle(double t, double l, double b, double r):top(min(t,b)),left(min(l,r)),bottom(max(t,b)),right(max(l,r)) {}
double width()const{return(right-left);}
double height()const{return(bottom-top);}
double area()const{return(width()*height());}
double perimeter()const{return((width()+height())*2);}
private:
double top, left, bottom, right;
};
double string_to_double( const std::string& s )
{
std::istringstream i(s);
double x;
if(!(i >> x))
return(0.0);
return(x);
}
// Returns 0.0 if the response is unrecognised.
double ask(std::string prompt)
{
std::cout<<prompt<<":\t";
std::string response;
std::cin>>response;
return(string_to_double(response));
};
int main()
{
std::cout<<"Enter the 4 coordinates for a rectangle (top, left, bottom, right).\n"<<std::endl;
double t=ask("Top coordinate");
double l=ask("Left coordinate");
double b=ask("Bottom coordinate");
double r=ask("Right coordinate");
rectangle rect(t,l,b,r);
std::cout<<std::endl;
std::cout<<"Width of rectangle:\t"<<rect.width()<<std::endl;
std::cout<<"Height of rectangle:\t"<<rect.height()<<std::endl;
std::cout<<"Area of rectangle:\t"<<rect.area()<<std::endl;
std::cout<<"Perimiter of rectangle:\t"<<rect.perimeter()<<std::endl;
std::cout<<std::endl;
}
There is no such concept as an overloaded class in C++. Only functions can be overloaded. Assuming you have a rectangle class with width and height members, you can encapsulate a get_area member method that returns the product of the width and height members. There is no need to overload anything to achieve this.
template
T height;
T width;
public:
Rect(T h, T w) {this->height = h; this->width=w;}
T area() {return this->height * this->width;}
}
int main() {
Rect
float area = r.area();
cout << "Area = " << area << endl;
return 0;
}
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size_t rectangle_perimeter (const size_t width, const size_t height) { return (width+height) * 2; }
Overloading the same method name with different number of arguments (and the data types), and perhaps with a different returned data type. The method signatures are different, only the names are the same. Overriding is to change the same method name with different implementation (the method body). The method signature stays the same.
It is possible to have more than one instance of the same class, because the class is simply the blue print for the actual object.
echo 'print a pattern'
In C++, overloading, overriding, and polymorphism have the following meanings...Overloading is when you create two functions of the same name, but with different argument types, or with a different number of arguments. The compiler generates code for each case. This can be done inside or outside a class. Operators can also be overloaded, as they are (for all practical purposes) functions, but operators can only be overloaded in the context of a class.Overriding is when you derive a child class from a base class, and you replace a method (function) of the base class with a method of the child class using the same type and number of arguments. This is not overloading - it is redeclaration - and the overridden method only applies when dealing with an instance of the child class.Polymorphism is the same as overriding, except that you declare any base method virtual, making all base and derived methods virtual. Virtual, in the context of a class, means to create a table in the static portion (all instances) of the class that point to the specific overridden variants of the methods of the class. This allows you to declare a pointer to the base class, initialize it with the address of an instance of either the base class or any of the child classes, invoke a method of the class, and have the proper binding determined at run-time.
2. Write a program using switch statement that reads a character representing a geometrical figure, then asks the user to enter the required data (ex. Radius for a circle, length and height for a rectangle, etc. ...) . The program should then print the area and circumference.Figures are: circle(c), square(s), rectangle(r), triangle (t).
PRINT "Give me the rectangle's length.": Input L PRINT "Give me the rectangle's width.": Input W PRINT "The rectangle's area is "; L x W PRINT "The rectangle's perimeter is "; 2 x (L + W) PRINT "You've been a great audience. I'm here til Thursday. Don't forget to tip your waiter. Have a nice day."
int length int breadth int area= (length x breadth) print area
Overloading the same method name with different number of arguments (and the data types), and perhaps with a different returned data type. The method signatures are different, only the names are the same. Overriding is to change the same method name with different implementation (the method body). The method signature stays the same.
It is possible to have more than one instance of the same class, because the class is simply the blue print for the actual object.
echo 'print a pattern'
a rectangle. it has four parallel sides each side is the same length as the one on the other side.
In C++, overloading, overriding, and polymorphism have the following meanings...Overloading is when you create two functions of the same name, but with different argument types, or with a different number of arguments. The compiler generates code for each case. This can be done inside or outside a class. Operators can also be overloaded, as they are (for all practical purposes) functions, but operators can only be overloaded in the context of a class.Overriding is when you derive a child class from a base class, and you replace a method (function) of the base class with a method of the child class using the same type and number of arguments. This is not overloading - it is redeclaration - and the overridden method only applies when dealing with an instance of the child class.Polymorphism is the same as overriding, except that you declare any base method virtual, making all base and derived methods virtual. Virtual, in the context of a class, means to create a table in the static portion (all instances) of the class that point to the specific overridden variants of the methods of the class. This allows you to declare a pointer to the base class, initialize it with the address of an instance of either the base class or any of the child classes, invoke a method of the class, and have the proper binding determined at run-time.
write a program to print A to Z on screen in c?
Method overloading is when you have multiple methods in a class that have the same name but a different signature.Ex:public void print (String s){}public void print(int a) {}If we use more than one same type of method but different parameters or parameter list with same no. of parameters within same class than it is called methodoverloading.if we use more than one different type of method within same class than we dont call it method overloadingfor example:public void add(int a , int b){systemout.println(a+b);}public void add(double a , double b){systemout.println(a+b);}public void add(string a , string b){systemout.println(a+b);}
A rectangle (or square).
Print Server
2. Write a program using switch statement that reads a character representing a geometrical figure, then asks the user to enter the required data (ex. Radius for a circle, length and height for a rectangle, etc. ...) . The program should then print the area and circumference.Figures are: circle(c), square(s), rectangle(r), triangle (t).