Define a Rectangle class that provides getLength and getWidth. Write a main that
ID: 3786698 • Letter: D
Question
Define a Rectangle class that provides getLength and getWidth. Write a main that creates a vector of Rectangles and finds the largest Rectangle on the basis of area. For this part of the assignment, you need to submit a separate .cpp file as well as a screenshot in your HWK submission indicating successful testing of the code. No credit will be given for code that does not compile or segfaults. Hint: Essentially, you want to tweak the Square class code of Figure 1.23, which is provided on Blackboard.
Explanation / Answer
main.cpp
#include <iostream>
#include "findmax.h"
#include <vector>
using std::vector;
using std::ostream;
using std::cout;
class Rectangle {
private:
double length;
double width;
public:
explicit Rectangle( double l = 0.0, double w = 0.0 ): length{ l }, width{ w } { }
double getLength( ) const{
return length;
}
double getWidth( ) const{
return width;
}
double getArea( ) const{
return (length * width);
}
double getPerimeter( ) const{
return (length + length + width + width);
}
void print( ostream & out = cout ) const{
out << "(Rect, len: " << length << ", width: " << width;
}
bool operator< (const Rectangle & rhs) const{
if (getArea() != rhs.getArea()){
return (getArea() < rhs.getArea());
} else {
return (getPerimeter() < rhs.getPerimeter());
}
}
};
ostream & operator<< (ostream & out, const Rectangle& rhs){
rhs.print(out);
return out;
}
int main(){
vector<Rectangle> v = {Rectangle{2.0,4.0}, Rectangle{3.0,3.0}, Rectangle{8.0,1.0}, Rectangle{4.0,2.25}};
cout << "Largest Rect: " << findMax(v) << std::endl;
return 0;
}
findMax.h
#ifndef FINDMAX_H
#define FINDMAX_H
#include <vector>
using std::vector;
template <typename Comparable>
const Comparable & findMax( const vector<Comparable> & a ){
int maxIndex = 0;
for (int i = 1; i < a.size(); ++i){
if (a[maxIndex] < a[i]){
maxIndex = i;
}
}
return a[maxIndex];
}
#endif
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