Objectives
- Use repetition
- Get user input
- Perform basic input validation
- Perform a calculation using a loop
- Display results of a calculation
Program requirements
- Include documentation comments at the start of the file.
- Follow the course style guidelines including indentation, naming conventions, spaces instead of tabs, etc.
- Declare integer variables for a start value, an end value, and a sum.
- Use a while or do/while loop to prompt the user and get an integer value between 1 and 500. If the user enters a value out of bounds, then display an error message and reprompt the user. Continue until the user enters a value within the requested range.
- Use a while or do/while loop to prompt the user and get an integer value between the starting value + 1 and 1000. If the user enters a value out of bounds, then display an error message and reprompt the user. Continue until the user enters a value within the requested range. The prompt must display the starting value plus one as the minimum value to be entered.
- Use a for loop to calculate the sum of the integers from the start value through the end value.
- Display the sum in a message which includes the start and end values. See the example program run for the specific format.
Example run
Enter starting value for loop (1 - 500): -3 Invalid starting value. Enter starting value for loop (1 - 500): 501 Invalid starting value. Enter starting value for loop (1 - 500): 230 Enter ending value for loop (231 - 1000): 230 Invalid ending value. Enter ending value for loop (231 - 1000): 1001 Invalid ending value. Enter ending value for loop (231 - 1000): 782 The sum of the integers from 230 through 782 is 279818
Rubric
- 2 points: Proper documentation comments
- 3 points: Follows style guidelines used in class (indentation, no tabs, variable names start with a lowercase letter, etc.)
- 2 points: Declare variables for start value, end value, and sum at start of program.
- 8 points: Use a do/while or while loop to get a start value from the user within the range 1 through 500. The prompt must display the range. If the value the user enters is out of range, an error message must be displayed and the user re-prompted.
- 10 points: Use a do/while or while loop to get an end value from the user within the range start+1 through 1000. The prompt must display the range. If the value the user enters is out of range, an error message must be displayed and the user re-prompted.
- 3 points: Calculate the sum of the integers from the start value through the end value using a for loop.
- 2 points: Display the result (sum) along with the start and end values. See the example run for the specific format.