Exercise 3.5

Write a program that calculates the  sum of the integers from 1 to 10.
Use the while statement to loop through the calculation and increment
statements. The loop should terminate when the value of x becomes 11. 

Exercise 3.8

Write a C program that calculates x raised to the y power. The program
should have a while repetition control statement. 

Exercise 3.20

The simple interest on a loan is calculated by the formula 
           interest = principal * rate * days / 365; 
The preceding formula assumes that rate is the annual interest rate, and
therefore includes the division by 365 (days). Develop a program that
will input principal, rate and days for several  loans, and will
calculate and display the simple interest for each loan, using the
preceding formula.  Here is a sample input/output dialog: 
 Enter loan principal (-1 to end): 1000.00 
 Enter interest rate: .1 
 Enter term of the loan in days: 365 
 The interest charge is $100.00 
 Enter loan principal (-1 to end): 1000.00 
 Enter interest rate: .08375 
 Enter term of the loan in days: 224 
 The interest charge is $51.40 
 Enter loan principal (-1 to end): 10000.00 
 Enter interest rate: .09 
 Enter term of the loan in days: 1460 
 The interest charge is $3600.00 
 Enter loan principal (-1 to end): -1

Exercise 3.23

Write a program that utilizes looping to print the numbers from 1 to 10
side by side on the same line with three spaces between numbers. 

Exercise 3.24

The process of finding the largest number (i.e., the maximum of a group
of numbers) is  used frequently in computer applications. For example, a
program that determines the winner of a  sales contest would input the
number of units sold by each salesperson. The salesperson who sold  the
most units wins the contest. Write a program that inputs a series of 10
numbers and determines and prints the largest of the numbers. Hint: Your
program  should use three variables as follows: 
- A counter to count to 10 (i.e., to keep track of how many numbers have 
  been input and to determine when all 10 numbers have been processed) 
- The current number input to the program 
- The largest number found so far 

Exercise 3.27

Modify the previous program to find the two largest values of the 10
numbers. [Note: You may input each number only once.] 

exercise 3.25

Write a program that utilizes looping to print the following table of
values:

 N         10*N      100*N     1000*N 
 1         10        100       1000 
 2         20        200       2000 
 3         30        300       3000 
 4         40        400       4000 
 5         50        500       5000 
 6         60        600       6000 
 7         70        700       7000 
 8         80        800       8000 
 9         90        900       9000 
 10        100       1000      10000 

The tab escape sequence, \t, may be used in the statement to separate the
columns with tabs.