Question

Using basic c++ write a separate code for each of the following:

1. Area Rectangle

• Write a program that asks the user to enter length and width of a rectangle and then display the rectangles area.

• Write the following functions

• getLength – prompt the user to enter length and return that value as a double

• getWidth – prompt the user to enter width and return that value as a double

• getArea – This method should take both the length and width as arguments and return the rectangles area.

• displayData – This method should accept length, width and area as arguments and display them in appropriate message.

• Output

Enter the rectangle's length: 21

Enter the rectangle's Width: 13.4

Length = 21.0

Width = 13.4

Area = 281.40000000000003

2. Financial Application

Write a function that computes future investment value at a given interest rate for a specified number of years.

FutureInvestmentValue = invAmount * ( 1 + monthlyInterestRate) **(numberOfYears*12)

Use the following function prototype double futureInvestmentValue(double invAmount, double monthlyInterestRate, int years). Write a test program that prompts the use to enter the investment amount and interest rate and prints a table that displays the future value for the years from 1 to 30 as shown below

Enter investment amount: 10000

Enter yearly interest rate: 6.25

Enter the year: 30

Years Future Value

1 10643.22

2 11327.81

---- -----

29   60969.97

30 64891.66

Answer 1

If you like the answer, please give a Thumps Up

Program 1

#include <iostream>
#include<iomanip>

using namespace std;
double getLength();
double getWidth();
double getArea(double length,double width);
void displayData(double length,double width,double area);

int main()
{
    double l,w,a;
    l=getLength();
    w=getWidth();
    a=getArea(l,w);
    displayData(l,w,a);

}
double getLength()
{
    double length;
    cout<<"Enter the rectangle's length: ";
    cin>>length;
    return length;
}

double getWidth()
{
    double width;
    cout<<"Enter the rectangle's width: ";
    cin>>width;
    return width;
}
double getArea(double length,double width)
{
    return(length*width);
}

void displayData(double length,double width,double area)
{
    cout<<"Length = "<<length<<endl;
    cout<<"Width = "<<width<<endl;
    cout<<"Area = "<<std::fixed << std::setprecision(14)<<area<<endl;
}

Output

Enter the rectangle's length: 21
Enter the rectangle's width: 13.4
Length = 21
Width = 13.4
Area = 281.40000000000003

Program 2

#include<iostream>
#include<math.h>
#include<iomanip>

using namespace std;

double futureInvestmentValue(double invAmount, double monthlyInterestRate, int years);
int main()
{
    double invAmount, yearlyInterestRate, monthlyInterestRate,f;
    int years,y;
    cout << "Enter investment amount: ";
cin >> invAmount;

cout << "Enter yearly interest rate: ";
cin >> yearlyInterestRate;
monthlyInterestRate=yearlyInterestRate/1200;

cout << "Enter the year: ";
cin >> years;

cout<<"\nYears\tFuture Value\n";
    for(y=1;y<=years;y++)
    {
        f=futureInvestmentValue(invAmount,monthlyInterestRate,y);
        cout<<y<<"\t"<<std::fixed << std::setprecision(2) <<f<<endl;

    }

   return 0;
}
double futureInvestmentValue(double invAmount, double monthlyInterestRate, int years)
{
    double FutureInvestmentValue;
    FutureInvestmentValue = invAmount*(pow((1 + monthlyInterestRate), years*12));
    return FutureInvestmentValue;
}

Output

Enter investment amount: 10000
Enter yearly interest rate: 6.25
Enter the year: 30

Years   Future Value
1       10643.22
2       11327.81
3       12056.43
4       12831.93
5       13657.30
6       14535.76
7       15470.73
8       16465.83
9       17524.95
10      18652.18
11      19851.92
12      21128.84
13      22487.88
14      23934.34
15      25473.84
16      27112.37
17      28856.28
18      30712.37
19      32687.85
20      34790.39
21      37028.17
22      39409.89
23      41944.80
24      44642.77
25      47514.27
26      50570.48
27      53823.26
28      57285.27
29      60969.97
30      64891.66