Database System Concepts
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Transcribed Image Text:Description of the assignment: Your program should read in a set of grades
(that are all integers) entered by the user. The user will signify the end of the list
of grades by entering -999. Do NOT process this value. You can assume that the
user will enter at least three grades and not more than 100 grades, all of which
will be integers in between 0 and 100, inclusive. For the set of grades, your
program should compute the minimum value, print this out to two decimal places
and remove it from the data. Then your program should compute the maximum
value, print it out to two decimal places and remove it from the data. Then, your
program should calculate the mean and standard deviation for the remaining set
of grades, and print these out to two decimal places. Finally, a histogram for this
data (without the highest and lowest grades) should be printed out as well.
Your program should include the following functions:
void readGrades (double grades [], int *n);
/* This function reads an unknown number of grades (maximum
of 100) into the array grades and counts the data items
that have been read. You are not supposed to prompt the
user to enter the grades. Just use scanf to read in the
grades. The end of the input is represented by a negative
number 999 */
Preconditions: An empty array which is initialized to 0
must be passed to the function.
Postconditions: Array
effective size of the
read) */
holds the input values and n is the
array (i.e the number of data items
void frequency (double grades [], int n)
/* Given an array of real numbers, this function finds out
frequency (number of students) for each interval 0-4, 5-
9,...,95 99, 100 prints out the frequency values and
plots the histogram */
int maximum (double grades [], int n) ;
/* Given an array of real numbers and the effective size of
the array (i.e. count of the numbers in the array), this
Transcribed Image Text:function returns the location of the highest number in the
array */
int minimum (double grades [], int n) ;
/* Given an array of real numbers and the effective size of
the array (i.e. count of the numbers in the array), this
function returns the location of the lowest number in the
array */
void deleteElement (double grades[], int *n, int loc);
/* Given an array of real numbers, the effective size of
the array and the location of the element to be deleted,
this function deletes that element from the array and
decrements the effective size, n, by one */
double mean (double grades [], int n) ;
/* Given an array of numbers and the effective size of the
array this function computes and returns the mean */
double StandardDeviation (double grades [], int n) ;
/* Given an array of numbers and the effective size of the
array, this function computes and returns the standard
deviation as described in the previous section */
Restrictions
Your program should include math.h system library to use sqrt() and pow()
functions.
Your source code should begin with comments containing the following
information:
/* Name:
Program Number:
Title:
Date:
*/
Each function should have a comment statement in the beginning to indicate
what inputs does it take and what output it delivers.
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