Allows you to create a database of students with their names, ID number and e-mail. Dynamically allocates enough space for unlimited number of students to be entered. Error handling for incorrect IDs and names that are too long/nonexistent

studentStruct.c

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

#define ROW 50
#define COL 900



int main () {

    struct student{

		int recordCount;
		char *firstName;
		char *lastName;
		char *id;
		char *email;

	};

	struct student *array;
	struct student temp;
	array = malloc(sizeof(struct student));

	int i = 0;
	int k = 0;
	char myFirst[ROW][COL];
	char myLast[ROW][COL];
	char myID[ROW][COL];
	char myEmail[ROW][COL];


	do {

        /** Getting first name **/

        printf("First Name: ");
		fgets(myFirst[i], 51, stdin);
		myFirst[i][strlen(myFirst[i]) + 1] = '\0';

        /** termination condition **/

		if (strncmp(myFirst[i], ".", 1) == 0)
        {
            break;
		}

		/** error checking first name **/


		while (strlen(myFirst[i]) > 50)
        {
            printf("Name too long, please try again\n");
            printf("First Name: ");
            fgets(myFirst[i], 51, stdin);
            myFirst[i][strlen(myFirst[i]) + 1] = '\0';
		}



		/** getting last name **/

		printf("Last Name: ");
		fgets(myLast[i], 51, stdin);
		myLast[i][strlen(myLast[i]) + 1] = '\0';

		/** error checking for last name **/

		while (strlen(myLast[i]) > 50)
        {
            printf("Name too long, please try again\n");
            printf("Last Name: ");
            fgets(myLast[i], 51, stdin);

            myLast[i][strlen(myLast[i]) + 1] = '\0';
		}

		/** getting ID number **/

		printf("ID#: ");
		fgets(myID[i], 20, stdin);
		myID[i][strlen(myID[i]) + 1] = '\0';

		/** error checking ID number **/

		while (strlen(myID[i]) < 10 || strlen(myID[i]) >= 11)
        {
            printf("ID must be 9 digits, please try again\n");
            printf("ID#: ");
            fgets(myID[i], 20, stdin);
            myID[i][strlen(myID[i]) + 1] = '\0';
		}

		for (k=0; k<10; k++){

            while (isalpha(myID[i][k])) {

                printf("No alphabet allowed\n");
                printf("ID#: ");
                fgets(myID[i], 20, stdin);
                myID[i][strlen(myID[i]) + 1] = '\0';

            }
		}


		/** getting email **/

		printf("Email: ");
		fgets(myEmail[i], 51, stdin);

		myEmail[i][strlen(myEmail[i]) + 1] = '\0';

		/**iterating and assigning record number **/

		i++;


	} while (strncmp(myFirst[i], ".", 1) != 0);


	int j = 0;
	for (j=0; j<i; j++) {


        array[j].firstName = malloc(sizeof(char)*(strlen(myFirst[j])));
        array[j].firstName = myFirst[j];

        array[j].lastName = malloc(sizeof(char)*(strlen(myLast[j])));
        array[j].lastName = myLast[j];

        array[j].id = malloc(sizeof(char)*(strlen(myID[j])));
        array[j].id = myID[j];

        array[j].email = malloc(sizeof(char)*(strlen(myEmail[j])));
        array[j].email = myEmail[j];

        array[j].recordCount = j;


	}




	for (j=0; j<i; j++) {

            for (k = 0; k < i-1; k++) {

                if (atoi(array[k].id) < atoi(array[k+1].id)) {

                    temp = array[k];
                    array[k] = array[k+1];
                    array[k+1] = temp;

                }
            }

	}

	for (j=0; j<i; j++) {

	    printf("%s%s%s%s", array[j].firstName, array[j].lastName, array[j].id, array[j].email);

	}

	//clean up

	for (j=0; j<i; j++) {

        free (array[j].firstName);
        free (array[j].lastName);
        free (array[j].id);
        free (array[j].email);
        free (array);
	}


	return 0;
}

/*****

tackling

3. removing newline
4. printing with commas
5. limiting length
6. error handling

*****/