Write a program that will process an arbitrary number of grades each time the program is run. (Hints: sentinel-controlled iteration.)

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Write a program that will process an arbitrary number of grades each time the program is run. (Hints: sentinel-controlled iteration.) 

 

If \( \text{grade} \geq 90 \), its corresponding letter grade is \( A \). If \( 80 \leq \text{grade} < 90 \), its corresponding letter grade is \( B \). If \( 70 \leq \text{grade} < 80 \), its corresponding letter grade is \( C \). If \( 60 \leq \text{grade} < 70 \), its corresponding letter grade is \( D \). If \( \text{grade} < 60 \), its corresponding letter grade is \( F \).

(a) After getting all grades, calculate the average.

(b) Count the numbers of all letter grades.

(c) Display a summary of the grade results indicating the number of each letter grade and the class average.

Using the following input sequence for checking: 78, 68, 34, 85, 89, 96, 86, 91, 68, 81, 54.
Transcribed Image Text:If \( \text{grade} \geq 90 \), its corresponding letter grade is \( A \). If \( 80 \leq \text{grade} < 90 \), its corresponding letter grade is \( B \). If \( 70 \leq \text{grade} < 80 \), its corresponding letter grade is \( C \). If \( 60 \leq \text{grade} < 70 \), its corresponding letter grade is \( D \). If \( \text{grade} < 60 \), its corresponding letter grade is \( F \). (a) After getting all grades, calculate the average. (b) Count the numbers of all letter grades. (c) Display a summary of the grade results indicating the number of each letter grade and the class average. Using the following input sequence for checking: 78, 68, 34, 85, 89, 96, 86, 91, 68, 81, 54.
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