Lab Steps: void increment(int &); void incrementWrong(int); int main( ) { int x,

Question

Lab Steps:

void increment(int &);

void incrementWrong(int);

int main( )

{

    int x, y;

    x = 50;

    y = 1;

    cout << "Before incrementing x is " << x << " and y is " << y << endl;

    increment(x);

    increment(y);

    cout << "After incrementing x is " << x << " and y is " << y << endl;   

    system("PAUSE");

    return 0;

}

void increment(int &number)

{

     number++;

}

void incrementWrong(int number)

{

     number++;

}

//Test of rectangle code

    int rectLen, rectWid;

     int rectLen2, rectWid2;

cout << "Enter values for 1st rectangle: " << endl;

getRectangle(rectLen, rectWid);

cout << "First rectangle has length " << rectLen <<" and width " << rectWid << endl;

cout << "Enter values for 2nd rectangle: " << endl;

getRectangle(rectLen2, rectWid2);

cout << "Second rectangle has length " << rectLen2 << "and width " << rectWid2 << endl;

Explanation / Answer

#include <iostream>

#include <cstdlib>

using namespace std;

void increment(int &);

void incrementWrong(int);

void getRectangle(int &, int &);

int getArea(int, int);

int getPerimeter(int, int);

int main( )

{

//Dispaying my name at first

cout << "My Name " << endl << endl;

int x, y;

x = 50;

y = 1;

cout << "Before incrementing x is " << x << " and y is " << y << endl;

increment(x);

increment(y);

cout << "After incrementing x is " << x << " and y is " << y << endl;

//Test of rectangle code

int rectLen, rectWid;

int rectLen2, rectWid2;

int rectArea, rectPerimeter;

int rectArea2, rectPerimeter2;

cout << "Enter values for 1st rectangle: " << endl;

getRectangle(rectLen, rectWid);

rectArea = getArea(rectLen, rectWid);

rectPerimeter = getPerimeter(rectLen, rectWid);

//Displaying details of first rectangle

cout << "First rectangle has length " << rectLen <<" and width " << rectWid << endl;

cout << "First rectangle has area " << rectArea <<" and perimeter " << rectPerimeter << endl;

cout << "Enter values for 2nd rectangle: " << endl;

  

getRectangle(rectLen2, rectWid2);

rectArea2 = getArea(rectLen2, rectWid2);

rectPerimeter2 = getPerimeter(rectLen2, rectWid2);

//Displaying Details of second rectangle

cout << "Second rectangle has length " << rectLen2 << "and width " << rectWid2 << endl;   

cout << "Second rectangle has area " << rectArea2 <<" and perimeter " << rectPerimeter2 << endl;

system("PAUSE");

return 0;

}

void increment(int &number)

{

number++;

}

void incrementWrong(int number)

{

number++;

}

void getRectangle(int &length, int &width)

{

cout << "Enter length of rectangle: ";

cin >> length;

while (length < 1)

{

cout << "Length must be positive, please re-enter length: ";

cin >> length;

}

cout << "Enter width of rectangle: ";

cin >> width;

while (width < 1)

{

cout << "Width must be positive, please re-enter Width: ";

cin >> width;

}

}

int getArea(int length, int width)

{

int area = length*width;

return area;

}

int getPerimeter(int length, int width)

{

int perimeter = 2*(length + width);

return perimeter;

}

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