Thread: Random number syntax in a struct

I can’t figure out the syntax on how to generate random numbers for two members of a struct. It seems so simple because I know what I want to do, I just can’t make it work. I have the random generators I want but I don’t know how to pull it over into my struct.

Code:

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


struct student {
  int id;
  int score;
};


struct student *allocate()
{
  /*Allocate memory for ten students */
  struct student *r = malloc(sizeof(struct student) * 10);


  /*return the pointer */
  return r;
}


void generate(struct student *students, int *rid, int *rscore)
{
  /*Generate random ID and scores for ten students, ID being between 1 and 10, scores between 0 and 100 */
  *rid = rand() % 10 + 1;       //ids
  *rscore = rand() % 101;       //scores
}


void output(struct student *students)
{
  /*Output information about the ten students in the format:
     ID1 Score1
     ID2 score2
     ID3 score3
     ...
     ID10 score10 */
  /*int rid, rscore;
     gernerate(students, &rid, &rscore);
     (*students).id = rid;   (*students).score = rscore;
     students->id = rid;
     students->score = rscore; */
}


void summary(struct student *students)
{
  /*Compute and print the minimum, maximum and average scores of the ten students */
  output(students);
  //printf("%d", *students);

}


void deallocate(struct student *stud)
{
  /*Deallocate memory from stud */
  free(stud);
}


int main()
{
  struct student *stud = NULL;

  /*call allocate */
  allocate();

  /*call generate */
  //generate(stud, &rid, &rscore); //I am aware that these are also ........ty. How do I properly call them

  /*call output */
  output(stud);

  /*call summary */
  summary(stud);

  /*call deallocate */
  deallocate(stud);

  return 0;
}

How can I "return the pointer" ? I thought the malloc does something like this for me?

Your function returns a pointer returned by malloc(). If you assigned what malloc() returned to a pointer, and you returned that pointer in kind, then what do you think you need to do with the return value of your function?