4. Advanced Memory Management with Structure Pointers

pravjot

Question: You are tasked with managing a collection of students, where each student has a variable number of scores. Define a `Student` structure that contains the student's ID, name, and a pointer to dynamically allocated memory for storing their scores. Write a C program that:

→ Dynamically allocates memory for 5 students.

→ For each student, dynamically allocates memory to store their scores (where the number of scores is different for each student).

→ Computes and prints the average score for each student.

→ Ensures all dynamically allocated memory is properly freed.

mdaliakbar

Two ways to access structure pointer

1)printf("%d %s %s %f %s\n",y->Roll,y->name,y->school,y->marks,y->grade);

OR

2)printf("%d %s %s %f %s\n",(*y).Roll,(*y).name,(*y).school,(*y).marks,(*y).grade);

2nd explanation:-bracket and dot both precedence are same. According to precidence.

ANS

I have do statically but try to dynamically

statically ANS is USE MODULAR PROGRAMMING

headers.h

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

structure.h
struct StudentInformation
   {
           int id;
           char name[50];
           float score;

   }; //vriable declear here also   depend upon for you

main.c

#include"headers.h"
#include"strcuture.h"

int main()
{
       struct StudentInformation arr[5]={{001,"sahid",39.98},{002,"anwar",35.7},{003,"ajmal",98.45},{004,"kamram",67.87},{005,"shahid",87.6}};
          //struct StudentInformation *ptr;
           //ptr=&arr;
           //ptr=(struct StudentInformation*)malloc(sizeof(struct StudentInformation)*5);
          //printf("Enter the 5 student details\n");
          //for(int i=0;i<5;i++)
          //       scanf("%d %s %f",(ptr+i)->id,(ptr+i)->name,(ptr+i)->score);
          for(int i=0;i<5;i++)
          {
                  printf("Student:%d\n",i+1);//count student number
                  printf("ID:%d\n",arr[i].id);
                  printf("Name:%s\n",arr[i].name);
                  printf("Score:%f\n",arr[i].score);
          }
          return 0;

}

OUT PUT OF THIS PROGRAM

Student:1
ID:1
Name:sahid
Score:39.980000
Student:2
ID:2
Name:anwar
Score:35.700001
Student:3
ID:3
Name:ajmal
Score:98.449997
Student:4
ID:4
Name:kamram
Score:67.870003
Student:5
ID:5
Name:shahid
Score:87.599998

4. Advanced Memory Management with Structure Pointers

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