Homework 3
This homework is intended to gauge your understanding of iteration and how to write basic functions, it is due on Thursday the 26th.
1) (15 points) Write a program which gets two integers from the user and finds their sum using a while loop. You may use only the unary increment operator (++), not the binary + operator.
2) (15 points) Write a program that sums the odd integers between 1 an 99 (don't include 1 and 99) using a for loop.
3) (15 points) Write a program that prints a multiplication square for 1 through 10 using nested for loops.
Your output should look something like this:
1 2 3 4 5 6 7 8 9 10
2 4 6 8 10 12 14 16 18 20
3 6 9 12 15 18 21 24 27 30
4 8 12 16 20 24 28 32 36 40
5 10 15 20 25 30 35 40 45 50
6 12 18 24 30 36 42 48 54 60
7 14 21 28 35 42 49 56 63 70
8 16 24 32 40 48 56 64 72 80
9 18 27 36 45 54 63 72 81 90
10 20 30 40 50 60 70 80 90 100
4) (25) Consider the following program which computes the growth rate of $10,000 at 4% interest compounded yearly:
#include <iostream.h>
int main()
{
// Program to compute compound interest
int years = 3;
float
rate = 0.04, amount = 10000.0;
years=0;
amount=amount+amount*rate;
years++;
cout << "Amount after year " << years << " is "
<< amount << endl;
amount=amount+amount*rate;
years++;
cout << "Amount after year " << years << " is "
<< amount << endl;
amount=amount+amount*rate;
years++;
cout << "Amount after year " << years << " is "
<< amount << endl;
return 0;
}
Now, using a for loop, write a program that gets the values amount, rate, and years from the user and prints the value of amount after each year.
5) (30) Write a function called return_on_investment which takes amount, rate and years as arguments and returns the value of amount after years. Don't print the value of amount for intermediary years.
Now write a program which gets amount, rate, and years from the user, passes those values to your function return_on_investment and prints "Your investment of $starting amount compounded at rate percent would be worth $final amount in years years." where the italicized parts are your variable (or function) values.