C program on hospital management system does not work

Question

Case study 8 – Develop a Hospital Management System Write C programs to

1. Store the patient details in to a text file.
2. View the details of patients using phone number, NIC , etc…
3. Store the patient channeling details to another text file.
4. Display the summary of the patients. create 4 seperate c programs covering all sections.

Can someone please help me because I don't get an output for section 2 and 4. section 1 and 3 works fine. All for sections are interconnected I guess.

**This is the code I created for section 1:

#include<stdio.h>
int main(void)
{
    int pnum,age,cnum,nic;
    char name[20],gender[6],address[50];

    FILE * fp;
    fp = fopen("patient.txt", "a");

    printf("Add patient details\n\n");

                printf("Patient number: ");
                scanf("%d", &pnum);
                printf("First name: ");
                scanf(" %s", &name);
                printf("Gender: ");
                scanf(" %s", &gender);
                printf("Age: ");
                scanf("%d", &age);
                printf("Address: ");
                scanf(" %s", &address);
                printf("NIC: ");
                scanf("%d", &nic);
                printf("Contact number: ");
                scanf("%d", &cnum);

                fprintf(fp, "%d %s %s %d %s %d %d\n", pnum, name, gender, age, address, nic, cnum);


    fclose(fp);
    return 0;
}

**This is the code I created for section 2:

#include<stdio.h>
int main(void)
{
    int pnum,age,cnum,nic;
    char name[20],gender[6],address[50];

    FILE * fp;
    fp = fopen("patient.txt", "r");

    if ( fp != NULL)
    {
        while(!feof(fp))
        {
            fscanf(fp, "%d %s %s %d %s %d %d", pnum, name, gender, age, address, nic, cnum);
            printf("%d %s %s %d %s %d %d", pnum, name, gender, age, address, nic, cnum);
        }
        fclose(fp);
    }
    else
    {
        printf("could not open file\n");
    }
    return 0;
}

**This is the code for section 3:

#include <stdio.h> 
int main(void)
{
    int pnum,chnum,nic;
    char name[20],doc[20],sickness[50];

    FILE * fp1;
    fp1 = fopen("channeling.txt", "a");

    printf("Add patient channeling details\n\n");
    printf("Patient number: ");
    scanf("%d", &pnum);
    printf("Channeling number: ");
    scanf("%d", &chnum);
    printf("First name: ");
    scanf(" %s", &name);
    printf("NIC: ");
    scanf("%d", &nic);
    printf("Sickness: ");
    scanf(" %s", &sickness);
    printf("Prescribed doctor: ");
    scanf(" %s", &doc);


                fprintf(fp1, " %d %d %s %d %s %s\n", pnum, chnum, name, nic, sickness, doc);


    fclose(fp1);
    return 0;
}

**This is the code for section 4:

#include<stdio.h>
int main(void)
{
    int pnum,age,cnum,nic;
    char name[20],gender[6],address[50];

    FILE * fp;
    fp = fopen("patient.txt", "r");

    if ( fp != NULL)
    {
        while(!feof(fp))
        {
            fscanf(fp, "%d %s %s %d %s %d %d", pnum, name, gender, age, address, nic, cnum);
            printf("%d %s %s %d %s %d %d", pnum, name, gender, age, address, nic, cnum);
        }
        fclose(fp);
    }
    else
    {
        printf("could not open file\n");
    }
    return 0;
}

Answer 1

Problems are:

1. while (!feof(fp) feof indicates an error has occurred. So the logic in your program is not correct. (if fscanf does get an error, printf will still get executed)

2. Forgot & in fscanf.