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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[画像: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]
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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
[画像: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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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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