Hello! I am stuck on a question. I can figure out how to ask the user and calcul

Question

Hello! I am stuck on a question. I can figure out how to ask the user and calculate the right interest . But adding a loop has me thrown off . any ideas ? Here is the problem :

Simple interest can be calculated as follows:
Interest = P*r*t where P = the principle, r = the interest rate, and t = time in years

For example, if a person starts with a principle = $100.00 at an interest rate = 0.04 where time = 3 years. The amount of interest is 12 dollars or 100.0 * 0.04 * 3 = 12

Design a class called Interest whose constructor accepts three arguments. The principle (in dollars), the rate (in decimal format), and the number of years represented as a variable called time (an integer). Besides the appropriate gets (accessors) and sets (mutators), it should have a method named getInterest that returns the interest, in dollars that the investment has earned.

Demonstrate the class in a program that uses a while loop (period < = time) to display the interest earned for each year of a time specified by the user. For example, if principle is $100.00, the interest rate is 0.04 for a three-year time period, it should display a report similar to the one shown here.

Year Interest Earned

14 28 3 12

Input Validation: Do not accept a negative number for principle and rate, and do not accept any value less than one for time traveled (use while loops to test for principle > = 0, and rate > = 0, and another while loop to test for time > 1).

Explanation / Answer

#include <iostream.h>

#include<conio.h>

class getinterest

{

int p,t;float r;

public:

getinterest(int i, float j,int k)

{

p=i;

r=j;

t=k;

while(p!=0&&r!=0&&t>1)

{

float d=p*r*t;

cout<<"the simple interest is"<<d;

}

}

void show()

{

cout<<"The principle amount is " <<p ;

cout<<"The rate of interest is" <<r;

cout<<"The time is in years " << t;

}

};

void main()

{

clrscr();

int x,y;float z;

cout<<"Enter the principle amount is ";

cin>>x;

cout<<"Enter the rate of interest is";

cin>z;

cout<<"Enter the time is in years ";

cin>>y;

getinterest ob(x,y,z);

ob.show();

getch();

}

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