Question

Generate a sub/function to simulate the roll of a single die. It should return a random number
between 1 and the maximum number of faces on that die. Allow the user to specify different
number of faces.                                                                                                                                                              20 pts

Generate a sub/function to determine the number of years it takes to double your money if you invest it, given a user specified interest rate. See attached spread sheet for examples.                                    20 pts

Example results (starting at $1)

1.5%          48 yrs           $2.013

2.0%          37 yrs           $2.040 (36 years gives you $1.99989)

2.5%          30 yrs           $2.046

Answer 1

FIRST QUESTION.

#include<bits/stdc++.h>

using namespace std;

int main()

{

srand(time(0));

int x;

cout<<"\nEnter the number of faces : ";

cin>>x;

if(x < 1)

{

cout<<"\nIncorrect input.";

exit(0);

}

int val = 1 + rand() % x;

cout<<"\nResult is : "<<val;

}

SECOND QUESTION

In Compound interest the formula for resulting amount is A = P * (1 + r/n)^(nt)

A = Amount

P = Principal value

r = Interest rate

n = No. of times compounded in a year,

t = time

***For amount to be doubled, A = 2P and in this case n = 1 as it is compounded annually.

CODE

#include<bits/stdc++.h>

using namespace std;

int main()

{

double rate;

cout<<"\nEnter the interest rate in % : ";

cin>>rate;

double P=1.0;

//Formula is A = P * (1 + r/n)^(n*t)

//n = 1; A = 2P;

//double time = 72.0 / rate;

double time = log(2.0) / log(1.00 + 0.01 * rate);

double x = P * ( 1.0 + (0.01 * rate));

double val = pow(x,time);

if(val < 2.0000005) //2.0000005 To compensate for the error.

{

time++;

}

cout<<"\nTime taken is : "<<ceil(time);

}

NOTE - For any other query, Pls use the comment section