Editing Records in a File

When editing the file, the file should be in existence.

As a reminder, what we did was create a file in notepad as shown below and then populate it with information. 

We then did the following:

1. open the file, so that we could read the information from it into arrays.
2. view the contents of the array to ensure that the correct data was in the array.
3. ask the user to enter the id number of the record that needed to be edited.
4. compare the id number entered by the user, with the idnums in the array
5. if the id number exists, we ask what needs to be changed using a case structure and then allow the user to edit;  if the id number does not exist we will inform the user.
6. when the change is made, a view takes place to ensure the changes were made
7. then we write to the file   

Consider the program below:

 #include<conio.h>
#include<stdio.h>
#include<string.h>

FILE *editptr;

int main()
{
    char name[3][40], idnum[3][5], search[5];
    int age[3];
   
   
    if((editptr = fopen("edit.txt", "r")) == NULL)
    {
        printf("FILE CANNOT OPEN");
    }
    else
    {
        for(int record = 0; record < 3; record++)
        {
            fgets(idnum[record],5,editptr);
            fscanf(editptr,"\n");//newline
            fgets(name[record],40,editptr);
            fscanf(editptr,"\n");//newline
            fscanf(editptr, "%d", &age[record]);
            fscanf(editptr,"\n");//newline
           
            printf("Idnum is %s\nName is %sAge is %d\n\n",idnum[record],name[record],age[record]);
        }
    }
    fclose(editptr);
   
    printf("What is the id number for the record that needs to be changed?");
    gets(search);
   
    int position = 0;
    int ans;
    int choice;
   
    while ((ans = strncmp(idnum[position], search, 4) != 0)&& (position<3))
    {
        position++;
    }
   
    if(position < 3)
    {
        printf("The record to be edited is %d", position);
       
        printf("\n\nWhat would you like to edit?\n1. IDNUM\n2. Name\n3.AGE\n");
        scanf("%d", &choice);
       
        switch(choice)
        {
             case 1: printf("Enter new IDNUM\t");
                     fflush(stdin);
                     gets(idnum[position]);
                     break;    
             case 2: printf("Enter new Name\t");
                     fflush(stdin); 
                     gets(name[position]);
                     break;  
             case 3: printf("Enter new age\t"); 
                     scanf("%d", &age[position]);
                     break;                      
             default:  printf("that option does not exist");
                       break;
        }   
             
       
    }
    else
    {
        printf("That ID number does not exist");
    }
   
    printf("\n\n\nThe updated records are:\n\n");
    for(int record = 0; record < 3; record++)
    {
                
            printf("Idnum is %s\nName is %s\nAge is %d\n\n",idnum[record],name[record],age[record]);
    }
     
     //writing to the file
     if((editptr = fopen("edit.txt", "w")) == NULL)
    {
        printf("FILE CANNOT OPEN");
    }
    else
    { 
        for(int record = 0; record < 3; record++)
        {
            fprintf(editptr, "%s\n%s\n%d\n",idnum[record],name[record],age[record]);
        }
    }
    fclose(editptr);
   
    getch();
    return 0;
}