Thread: build an array of pointers to structures and dinam allocate strings within the struct

Hello I have the following code hoping to build an array of pointers to structures and dinamically allocate strings within the structures. Any help will suffice!

Code:

#include "v4.h"

int main()
{


    int i;
    int num;
    studentRecord *student;


    scanf("%d",&num);
    for(i = 0; i < num; i++)
    {
        student = (studentRecord *) malloc (sizeof(studentRecord));
        scanf("%s %s %s %d %d %d",student->lastName, student->firstName, 
               student->idNum, &student->exam1, &student->exam2, 
               &student->exam3);


        student->avg = (student->exam1 + student->exam2 + student->exam3)/3.;
        if( student->avg >= 90.0 ) student->grade = 'A';
        else if( student->avg >= 80.0 ) student->grade = 'B';
        else if( student->avg >= 70.0 ) student->grade = 'C';
        else if( student->avg >= 60.0 ) student->grade = 'D';
        else student->grade = 'F';


        printf("%s, %s: %s, %s \n\t %4d %4d %4d %s %6.2f %s  %c\n",
               student->lastName, student->firstName, student->idNum, 
               "has exams scores of:", student->exam1, student->exam2, 
               student->exam3, "for an average of ", student->avg,
               " and a grade of ",student->grade); 
    }
    return 0; 
}

v4.h file

Code:

#include <stdio.h>


typedef struct {
        char lastName[30];
        char firstName[30];
        char idNum[9];
        int exam1;
        int exam2;
        int exam3;
        float avg;
        char grade;
    }studentRecord;

So where's the question here?


Quzah.

I would normally mention that dynamic is spelled with a y, but I'm trying to cut down.

Originally Posted by mz0086

How to build an array of pointers to structures using what i have?

Pretty simple:

Code:

studentRecord *student;

Becomes:

Code:

studentRecord *student[ SOME_SIZE ];

Quzah.

Do you know how to dynamically allocate memory for a pointer? If not, read this: Pointers in C - Tutorial - Cprogramming.com
Once you understand that, give it a try and post your updated code.


Quzah.