Question

Hello!

*Need in C language also need full documentation/explanation of each line*

Designing and implementing an Array of Structures - Course Grade

Write a program that uses a structure to store the following data:

Member Name Description

Name Student name

Idnum Student ID number

Scores [NUM_TESTS] an array of test scores

Average Average test score

Grade Course grade

Declare a global const directly above the struct declaration
const int NUM_TESTS = 4; //a global constant

The program should ask the user how many students there are and should then dynamically allocate an array of structures.

The Student struct includes a fixed size scores array to store a list of four test scores for a group of students .

After the array of struct has been dynamically allocated, the program should ask for the name, ID number and four test scores for each student. The average test score should be calculated and stored in the average member of each structure.

The course grade should be computed on the basis of the following grading scale:

Average Test Grade Course Grade

91–100 A

81-90 B

71-80 C

61-70 D

60 or below F

The course grade should then be stored in the Grade member of each structure.

Once all this data is calculated, a table should be displayed on the screen listing each student’s name, ID number, average test score, and course grade.

Input Validation: Be sure all the data for each student is entered. Do not accept negative numbers for any test score.

A sample test run using the Code::Block IDE-Compiler

How many students? 3

Student name: Sandy Shell

ID Number: 12345

Test # 1: 100

Test # 2: 56

Test # 3: 78

Test # 4: 66

Student name: Timothy Moriarty

ID Number: 23456

Test # 1: 90

Test # 2: 78

Test # 3: 45

Test # 4: 56

Student name: Joice Smith

ID Number: 54321

Test # 1: 100

Test # 2: 98

Test # 3: 67

Test # 4: 75

===========================

Course Grade Report

===========================

Student name: Sandy Shell

ID number: 12345

Average test score: 75.0

Grade: C

Student name: Timothy Moriarty

ID number: 23456

Average test score: 67.2

Grade: D

Student name: Joice Smith

ID number: 54321

Average test score: 85.0

Grade: B

Process returned 0 (0x0) execution time : 94.219 s

Press any key to continue.

Please make sure to declare the global constant and your struct above any function prototypes and include appropriate function documentation as needed.

Here is a sample of function prototypes that you may consider implementing...

// Function prototypes

Student *initArrays(int);

void getInfo(Student [], int);

void showInfo(Student [], int);

You may use pointers or constant reference parameters when passing the structure to the functions mentioned above.

*EXTRA CREDIT COMPONENT FOR ASSIGNMENT#7 (5 points) - Select only one and insert as a multiline comment in your source code submitted.

1. How would you modify the program that you wrote for Programming Challenge 7a (monthly budget) so it defines an enumerated data type with enumerators for the months (JANUARY, FEBRUARY, so on). Provide a code snippet on how the program may use the enumerated type to step through each months expense and budget comparison for a full year.

or

2. How would you modify the program that you wrote for Programming Challenge 7b (course grades) so it defines struct member scores as a pointer to an array of test scores. What additional program statements will be needed so that each structure’s score member should point to a dynamically allocated array that will hold the test scores.

Answer 1

#include <stdio.h>

//declaring global constant
const int NUM_TESTS = 4;
//declare a global structure
struct Grade{
//declaring variables
char name[50];
int id;
int scores[4];
float average;
char grade;
};
//declaration of the function get info
void getInfo(struct Grade *g,int n);
//declaration of the function show info
void showInfo(struct Grade *g,int n);
//main function
int main()
{
int n,i,j;
//getting number of students
printf("How many Students? ");
scanf("%d",&n);
//declaring array of structures
struct Grade g[n];
//input values for array of structures
for(i=0;i<n;i++){
printf("Name: ");
//That space in front of % is very important to get space
//separated string input without skipping of input
// if you leave the space in front of % it will skip the input command
scanf(" %[^\n]s",&g[i].name);
printf("Id: ");
scanf("%d",&g[i].id);
for(j=0;j<NUM_TESTS;j++){
printf("Test #%d: ",j+1);
scanf("%d",&g[i].scores[j]);
}
printf("\n");
}
//calling get info method
getInfo(g,n);
printf("---------------------------\n");
printf("---------------------------\n");
printf(" Course Grade Report \n");
printf("---------------------------\n");
printf("---------------------------\n");
//calling show info method
showInfo(g,n);
return 0;
}
//function for getting and calculation of values
void getInfo(struct Grade *g,int n){
int i,j;
//calculating average
for(i=0;i<n;i++){
int sum=0;
for(j=0;j<NUM_TESTS;j++){
sum = sum+g[i].scores[j];
}
g[i].average= sum/NUM_TESTS;
//calculating grades
if (g[i].average>90){
g[i].grade = 'A';
}
else if(g[i].average>80){
g[i].grade = 'B';
}
else if(g[i].average>70){
g[i].grade = 'C';
}
else if(g[i].average>60){
g[i].grade = 'D';
}else{
g[i].grade = 'F';
}
}
}
//function to print structure elements
void showInfo(struct Grade *g,int n){
int i;
//printing array if structure values
for(int i=0;i<n;i++){
printf("Student Name: %s\n",g[i].name);
printf("Student id: %d\n",g[i].id);
printf("Average Test Score: %.1f\n",g[i].average);
printf("Grade %c\n",g[i].grade);
printf("\n");
}
}