LoopWithSentinel Program
Description
There are a number of students, each with a test score.This program inputs a test score for each student, calculates the average score, and finds the highest score
(assume there is no tie) until a sentinel value is entered.
Because we don't now in advance the number of students, so the sentinel-controlled while loop is used.
The sentinel is a special value to indicate the end of loop.
Associated Concepts:
Sentinel-controlled while loop
Algorithm:
Initialize sum and count variables to zero
Initialize highest variable to a very small number
Input a test score before entering the loop body
Use a sentinel-controlled while loop (-1 as the sentinel value)
(If the score is not equal to -1, the loop continues.)
(If the score is equal to -1, the loop ens.)
If the input is valid
Add the score to sum
Increment count
Assign the score to highest if the score is larger than the current highest value
Otherwise
Print an error message
Input another test score at the end of the while loop body
Once the loop is ended, calculate the average
Print the result
Initialize highest variable to a very small number
Input a test score before entering the loop body
Use a sentinel-controlled while loop (-1 as the sentinel value)
(If the score is not equal to -1, the loop continues.)
(If the score is equal to -1, the loop ens.)
If the input is valid
Add the score to sum
Increment count
Assign the score to highest if the score is larger than the current highest value
Otherwise
Print an error message
Input another test score at the end of the while loop body
Once the loop is ended, calculate the average
Print the result
Source Code
Sample Run
