I cant run my C program and it showed the erorrs. I had spent alots of time on t

Question

I cant run my C program and it showed the erorrs. I had spent alots of time on this lab, but still confused.I've be really thankful, if someone could help me.

In this lab we will have file that called Lab10_main.c . All your work will be done in the Lab10_main.c. The program consists of an array Database[], this array is an array of struct StudentInfo.

Each array elements have the following format :

struct StudentInfo{

char name[50];

int studentID;

int creditHours;

double cgpa;

Purpose of Program:

In your program you are to do the following:

1)      Compute the number of students with credit hours above 9

2)      Sort the array based on the student ID

3)      Calculate the average of the cgpa

Your main (it is provided to you) should look like this:

int main()

{

struct StudentInfo Database [25]={NULL};             

int i, studentNumber;

studentNumber = generate_list(Database);//I wrote in Lab10.c generates random data info

printf(" original list *************** ");

printf("%-24s %6s %22s %12s ", "NAME", "ID", "CREDIT HOURS", "CGPA");

for(i=0;i<studentNumber; i++)

printf("%-24s %7d %17d %16.2lf ", Database[i].name, Database[i].studentID, Database [i].creditHours, Database [i].cgpa);

printf(" sort by ID *************** ");

printf("%-24s %6s %22s %12s ", "NAME", "ID", "CREDIT HOURS", "CGPA");

sortByID(Database, studentNumber);

for(i=0;i< studentNumber; i++)

printf("%-24s %7d %17d %16.2lf ", Database[i].name, Database[i].studentID, Database [i].creditHours, Database [i].cgpa);         

printf(" ");

printf("The average cgpa is %.2lf ", computeAverageCGPA (Database, studentNumber));

printf("The number of students with credit hours over over 9 are %d ", GetNumberofStudentsCreditHoursOver9 (Database, studentNumber));

printf(" ");

}

You should declare and define the following functions in your main:

1)      int GetNumberofStudentsCreditHoursOver9 (struct StudentInfo Database[], int studentNumber);

2)      void sortByID(struct StudentInfo Database[], int studentNumber);

double computeAverageCGPA(struct StudentInfo Database[], int studentNumber);

/*Lab10_main.c*/

Explanation / Answer

Hi, I have implemented all three methods that you have mentioned in your post. I have not implemented anu function available in Lab10.h, because Lab10.c file is with you. Right ?. So, you should have at lease generate_list() method implemented in Lab10.c file, because this program is using this methods to generate StudentInfo list.

#include <stdlib.h>
#include <stdio.h>
#include <string.h>

#include "Lab10.h"

int GetNumberofStudentsCreditHoursOver9 (struct StudentInfo Database[], int studentNumber);
void sortByID(struct StudentInfo Database[], int studentNumber);
double computeAverageCGPA(struct StudentInfo Database[], int studentNumber);

int main()
{

        struct StudentInfo Database [25];            
        int i, studentNumber;

      
        studentNumber = generate_list(Database);//I wrote in Lab10.c generates random data info
      
        printf(" original list *************** ");
        printf("%-24s %6s %22s %12s ", "NAME", "ID", "CREDIT HOURS", "CGPA");
        for(i=0;i<studentNumber; i++)
        printf("%-24s %7d %17d %16.2lf ", Database[i].name, Database[i].studentID, Database [i].creditHours, Database [i].cgpa);
          
        printf(" sort by ID *************** ");
                printf("%-24s %6s %22s %12s ", "NAME", "ID", "CREDIT HOURS", "CGPA");
        sortByID(Database, studentNumber);
        for(i=0;i< studentNumber; i++)
        printf("%-24s %7d %17d %16.2lf ", Database[i].name, Database[i].studentID, Database [i].creditHours, Database [i].cgpa);     
      
        printf(" ");
  
        printf("The average cgpa is %.2lf ", computeAverageCGPA (Database, studentNumber));

        printf("The number of students with credit hours over over 9 are %d ", GetNumberofStudentsCreditHoursOver9 (Database, studentNumber));
      
        printf(" ");
      
}

int GetNumberofStudentsCreditHoursOver9 (struct StudentInfo Database[], int studentNumber)
{
       int i;
       int count = 0;
       for(i=0; i<studentNumber; i++){
           if(Database[i].creditHours > 9)
               count++;
       }
        return count;
}
void sortByID(struct StudentInfo Database[], int studentNumber)
{
   int i, min_index, j;
   //using selection sort
  
   for(i=0; i<studentNumber; i++){
      
       min_index = i;
       for(j=i+1; j<studentNumber; j++){
           if(Database[min_index].studentID > Database[j].studentID)
               min_index = j;
              
       //swapping
       struct StudentInfo temp = Database[i];
       Database[i] = Database[min_index];
       Database[min_index] = temp;
       }
   }

}
double computeAverageCGPA(struct StudentInfo Database[], int studentNumber)
{
   double total = 0;
   int i;
   for(i=0; i<studentNumber; i++){
       total = total + Database[i].cgpa;
   }
  
    return total/studentNumber;
}

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