Question

Please complete the c++ code. The code that needs completing is outlined in the comments.

#include <stdio.h>

#include<stdlib.h>

#include<math.h>

struct student{

int id; int score;};

struct student* allocate(){

/*Allocate memory for ten students*/

/*return the pointer*/

}

void generate(struct student* students){

/*Generate random and unique ID and scores for ten students, ID being between 1 and 10, scores between 0 and 100*/

}

void output(struct student* students){

/*Output information about the ten students in the format: ID1 Score1 ID2 score2 ID3 score3 ... ID10 score10*/

}

void summary(struct student* students){

/*Compute and print the minimum, maximum and average scores of the ten students*/

}

void deallocate(struct student* stud){

/*Deallocate memory from stud*/

}

int main(){

struct student* stud = NULL;

/*call allocate*/

/*call generate*/

/*call output*/

/*call summary*/

/*call deallocate*/

return 0;

}

Answer 1

// C code
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <time.h>
#include <assert.h>

struct student
{
int id;
int score;
};

struct student* allocate()
{
   /*Allocate memory for ten students*/
   struct student* s = malloc(10 * sizeof(struct student));
   /*return the pointer*/
   return s;
}

void generate(struct student* students)
{
   /*Generate random and unique ID and scores for ten students, ID being between 1 and 10, scores between 0 and 100*/
   int i, j;
   int new;// To check for new initials
   for (i = 0; i < 10; i++)
   {
      new = 1;
      students[i].id = ((rand() % 10) + 1);
    
      for (j = 0; j < i; j++)
      {
         if (students[i].id == students[j].id)
         {
            new = 0;
            break;
         }

      }

   if(new == 0)
   {
      i--;
      continue;
   }

   students[i].score = ((rand() % 100));
   }

}

void output(struct student* students)
{
   /*Output information about the ten students in the format: ID1 Score1 ID2 score2 ID3 score3 ... ID10 score10*/
   int i;
   for (i = 0;i < 10; i++)
   {
      printf("ID: %d ", students[i].id);
      printf("Score: %d\n", students[i].score);
   }
}

void summary(struct student* students)
{
   /*Compute and print the minimum, maximum and average scores of the ten students*/
   int i, min, max;
   float avg, sum = 0;

   min = students[0].score;
   max = students[0].score;

   for (i = 0; i<10; i++)
   {
      if (students[i].score < min)
      {
         min = students[i].score;
      }

      if (students[i].score > max)
      {
         max = students[i].score;
      }

      sum = sum + students[i].score;
   }

   avg = (sum / 10);

   printf("Minimum score: %d\n", min);
   printf("Maximum score: %d\n", max);
   printf("Average score: %g\n", avg);
}

void deallocate(struct student* s)
{
   /*Deallocate memory from stud*/
   assert(s != NULL); // Break off program if null, so we don't get a segmentation fault in freeing the memory.
   free(s);
}

int main()
{
   srand(time(NULL));
   struct student* stud = NULL;
   /*call allocate*/
   stud = allocate();
   /*call generate*/
   generate(stud);
   /*call output*/
   output(stud);
   /*call summary*/
   summary(stud);
   /*call deallocate*/
   deallocate(stud);
   return 0;
}

/*
output:

ID: 1 Score: 35
ID: 8 Score: 71
ID: 2 Score: 33
ID: 7 Score: 49
ID: 4 Score: 88
ID: 3 Score: 6
ID: 6 Score: 19
ID: 10 Score: 48
ID: 9 Score: 5
ID: 5 Score: 15
Minimum score: 5
Maximum score: 88
Average score: 36.9

*/