fread/fwrite

chopficaro · #1 10-May-2008, 16:45

ok i got past that part i posted about before, now im having some more trouble. i can add 2 patients easily to the file. then i try to display them. it displays the first one just fine, but the second it tries to display the first value in the [1]th element of the array, i get an error message. that part of my code is marked with a /*error*/ just before it. easy to find plz help this is due monday.

heres my code

CPP / C++ / C Code:

#include "iostream"
#include "stdio.h"
#include "stdlib.h"
#include "string.h"
#include "process.h"
#define maxpatients 8
using namespace std;
 
void main();
 
 
 
struct namestruct
{
    char firstName[32];
    char middleI;
    char lastName[32];
};
 
struct addressstruct
{
    char streetAddress[32];
    char city[32];
    char state[3];
    int zipcode;
};
 
struct locationstruct
{
    int numFloor;
    int numRoom;
    unsigned char subLocation;
};
 
struct geninfostruct
{
    addressstruct address;
    char phoneNumber[12];
};
 
struct insuranceinfostruct
{
    char nameCarrier[32];
    geninfostruct insurancegeninfo;
    float deductable;
};
 
struct datestruct
{
    int day;
    int month;
    int year;
};
 
struct patientstruct
{
    namestruct namepatient;
    int age;
    geninfostruct geninfopatient;
    insuranceinfostruct insurence;
    datestruct dischargedate;
    locationstruct locationpatient;
    char information[1024];
};
 
 
 
char menu()
{
    char option1;
    do
    {
    system("cls");
    printf("press a coresponding key and then press enter to choose an option:\n1. open a file\n2. write database to file\n3. display patients\n4. find a patient\n5. add a patient\n6. delete a patient\n7. move a patient\n8.print out patients by discharge date\n");
    option1 = getchar();
    }
    while (option1<'1' || option1 > '7');
 
    fflush(stdin);
 
    return option1;
}
 
void addpatient(patientstruct (*patientstructpointer)[maxpatients], int (*count)=0)
{
    patientstruct patientstruct1[maxpatients];
    int numread;
    char yesno;
    FILE *fp;
    fp=fopen("c:\\patientdirectory.txt","r");
    if(fp==NULL)
    {
        printf("file not found. create one?y/n");
        fflush(stdin);
        do
        {
//            scanf_s("%c",&yesno);
            cin>>yesno;
            switch(yesno)
            {    
                case 'y':
                    break;
                case 'n':
                    main();
                    break;
                default:
                    printf("please enter y for yes or n for no and press enter");
                    break;
            }
        }while(yesno!='y');
    }
    else
    {
        while (!feof(fp))
        {
            numread = fread((patientstructpointer)[*count],sizeof(*patientstructpointer),1,fp);
            (*count)++;
        }
    }
 
 
 
 
 
 
 
 
    system("cls");
 
    fflush(stdin);
    printf("\nEnter the patient's first name\n");
    gets_s((*patientstructpointer)[*count].namepatient.firstName);
    fflush(stdin);
    printf("\nEnter the patient's middle initial\n");
    (*patientstructpointer)[*count].namepatient.middleI=getchar();
    fflush(stdin);
    printf("\nEnter the patient's last name\n");
    gets_s((*patientstructpointer)[*count].namepatient.firstName);
    fflush(stdin);
    printf("\nEnter the patient's age\n");
    scanf_s("%d",&(*patientstructpointer)[*count].age);
    fflush(stdin);
    printf("\nEnter the patient's state of residence\n");
    gets_s((*patientstructpointer)[*count].geninfopatient.address.state);
    printf("\nEnter the patient's city of residence\n");
    gets_s((*patientstructpointer)[*count].geninfopatient.address.city);
    fflush(stdin);
    printf("\nEnter the patient's zipcode of residence\n");
    scanf_s("%d",&(*patientstructpointer)[*count].geninfopatient.address.zipcode);
    fflush(stdin);
    printf("\nEnter the patient's street address of residence\n");
    gets_s((*patientstructpointer)[*count].geninfopatient.address.streetAddress);
    fflush(stdin);
    printf("\nEnter the patient's phone number\n");
    gets_s((*patientstructpointer)[*count].geninfopatient.phoneNumber);
    fflush(stdin);
    printf("\nEnter the patient's insurance carrier's name\n");
    gets_s((*patientstructpointer)[*count].insurence.nameCarrier);
    fflush(stdin);
    printf("\nEnter the patient's insurance carrier's state\n");
    gets_s((*patientstructpointer)[*count].insurence.insurancegeninfo.address.state);
    fflush(stdin);
    printf("\nEnter the patient's insurance carrier's city\n");
    gets_s((*patientstructpointer)[*count].insurence.insurancegeninfo.address.city);
    fflush(stdin);
    printf("\nEnter the patient's insurance carrier's zipcode\n");
    scanf_s("%d",&(*patientstructpointer)[*count].insurence.insurancegeninfo.address.zipcode);
    fflush(stdin);
    printf("\nEnter the patient's insurance carrier's street address\n");
    gets_s((*patientstructpointer)[*count].insurence.insurancegeninfo.address.streetAddress);
    fflush(stdin);
    printf("\nEnter the patient's insurance carrier's deductable\n");
    scanf_s("%f",&(*patientstructpointer)[*count].insurence.deductable);
    fflush(stdin);
    printf("\nEnter the patient's year of discharge\n");
    scanf_s("%d",&(*patientstructpointer)[*count].dischargedate.year);
    fflush(stdin);
    printf("\nEnter the patient's month of discharge\n");
    scanf_s("%d",&(*patientstructpointer)[*count].dischargedate.month);
    fflush(stdin);
    printf("\nEnter the patient's day of discharge\n");
    scanf_s("%d",&(*patientstructpointer)[*count].dischargedate.day);
    fflush(stdin);
    printf("\nEnter the patient's floor number\n");
    scanf_s("%d",&(*patientstructpointer)[*count].locationpatient.numFloor);
    fflush(stdin);
    printf("\nEnter the patient's room number\n");
    scanf_s("%d",&(*patientstructpointer)[*count].locationpatient.numRoom);
    fflush(stdin);
    printf("\nEnter the patient's location number\n");
//location
    ((*patientstructpointer)[*count].locationpatient.subLocation)=1;
    int locationnumber;
    scanf_s("%d",&locationnumber);
        switch(locationnumber)
        {    
        case 1:
            break;
        case '2':
            ((*patientstructpointer)[*count].locationpatient.subLocation)=((*patientstructpointer)[*count].locationpatient.subLocation)<<1;
            break;
        case '3':
            ((*patientstructpointer)[*count].locationpatient.subLocation)=((*patientstructpointer)[*count].locationpatient.subLocation)<<2;
            break;
        case '4':
            ((*patientstructpointer)[*count].locationpatient.subLocation)=((*patientstructpointer)[*count].locationpatient.subLocation)<<3;
            break;
        case '5':
            ((*patientstructpointer)[*count].locationpatient.subLocation)=((*patientstructpointer)[*count].locationpatient.subLocation)<<4;
            break;
        case '6':
            ((*patientstructpointer)[*count].locationpatient.subLocation)=((*patientstructpointer)[*count].locationpatient.subLocation)<<5;
            break;
        case '7':
            ((*patientstructpointer)[*count].locationpatient.subLocation)=((*patientstructpointer)[*count].locationpatient.subLocation)<<6;
            break;
        case '8':
            ((*patientstructpointer)[*count].locationpatient.subLocation)=((*patientstructpointer)[*count].locationpatient.subLocation)<<7;
            break;
        default:
            printf("you're fired");
        }
    fflush(stdin);
    printf("\nEnter the patient's description (less than 1023 characters please)\n");
    gets_s((*patientstructpointer)[*count].information);
    fp=fopen("c:\\patientdirectory.txt","a");
/**/fwrite ((patientstructpointer)[*count],sizeof((*patientstructpointer)),1,fp);
}
 
 
 
 
 
void displaypatients()
{
    FILE *fp;
    fp=fopen("c:\\patientdirectory.txt","r");
    patientstruct (*patientstructpointer)[maxpatients];
    patientstruct (patientstruct1)[maxpatients];
    (patientstructpointer)=&(patientstruct1);
    int numread;
    int *count;
    int asa;
    count=&asa;
    asa=0;
    while (!feof(fp))
    {
        numread = fread((patientstructpointer)[*count],sizeof(*patientstructpointer),1,fp);
        fflush(stdin);
        printf("\npatient's first name\n");
/*ERROR*/        puts((*patientstructpointer)[*count].namepatient.firstName);
        fflush(stdin);
        printf("\npatient's middle initial\n");
        printf("%c",(*patientstructpointer)[*count].namepatient.middleI);
        fflush(stdin);
        printf("\npatient's last name\n");
        puts((*patientstructpointer)[*count].namepatient.firstName);
        fflush(stdin);
        printf("\npatient's age\n");
        printf("%d",(*patientstructpointer)[*count].age);
        fflush(stdin);
        printf("\npatient's state of residence\n");
        puts((*patientstructpointer)[*count].geninfopatient.address.state);
        printf("\npatient's city of residence\n");
        puts((*patientstructpointer)[*count].geninfopatient.address.city);
        fflush(stdin);
        printf("\npatient's zipcode of residence\n");
        printf("%d",(*patientstructpointer)[*count].geninfopatient.address.zipcode);
        fflush(stdin);
        printf("\npatient's street address of residence\n");
        puts((*patientstructpointer)[*count].geninfopatient.address.streetAddress);
        fflush(stdin);
        printf("\npatient's phone number\n");
        puts((*patientstructpointer)[*count].geninfopatient.phoneNumber);
        fflush(stdin);
        printf("\npatient's insurance carrier's name\n");
        puts((*patientstructpointer)[*count].insurence.nameCarrier);
        fflush(stdin);
        printf("\npatient's insurance carrier's state\n");
        puts((*patientstructpointer)[*count].insurence.insurancegeninfo.address.state);
        fflush(stdin);
        printf("\npatient's insurance carrier's city\n");
        puts((*patientstructpointer)[*count].insurence.insurancegeninfo.address.city);
        fflush(stdin);
        printf("\npatient's insurance carrier's zipcode\n");
        printf("%d",(*patientstructpointer)[*count].insurence.insurancegeninfo.address.zipcode);
        fflush(stdin);
        printf("\npatient's insurance carrier's street address\n");
        puts((*patientstructpointer)[*count].insurence.insurancegeninfo.address.streetAddress);
        fflush(stdin);
        printf("\npatient's insurance carrier's deductable\n");
        printf("%f",(*patientstructpointer)[*count].insurence.deductable);
        fflush(stdin);
        printf("\npatient's year of discharge\n");
        printf("%d",(*patientstructpointer)[*count].dischargedate.year);
        fflush(stdin);
        printf("\npatient's month of discharge\n");
        printf("%d",(*patientstructpointer)[*count].dischargedate.month);
        fflush(stdin);
        printf("\npatient's day of discharge\n");
        printf("%d",(*patientstructpointer)[*count].dischargedate.day);
        fflush(stdin);
        printf("\npatient's floor number\n");
        printf("%d",(*patientstructpointer)[*count].locationpatient.numFloor);
        fflush(stdin);
        printf("\npatient's room number\n");
        printf("%d",(*patientstructpointer)[*count].locationpatient.numRoom);
        fflush(stdin);
        printf("\npatient's location number\n");
//location
        int locationnumber;
        switch((*patientstructpointer)[*count].locationpatient.subLocation)
        {    
            case 1:
                locationnumber=1;
                break;
            case (1<<1):
                locationnumber=2;
                break;
            case (1<<2):
                locationnumber=3;
                break;
            case (1<<3):
                locationnumber=4;
                break;
            case (1<<4):
                locationnumber=5;
                break;
            case (1<<5):
                locationnumber=6;
                break;
            case (1<<6):
                locationnumber=7;
                break;
            case (1<<7):
                locationnumber=8;
                break;
            default:
                locationnumber=0;
                printf("you're fired");
            }
            printf("%d",locationnumber);
        fflush(stdin);
        printf("\npatient's description (less than 1023 characters please)\n");
        puts((*patientstructpointer)[*count].information);
        (*count)++;
    }
 
        printf("\npress any key to continue\n");
        getchar();
}
 
 
 
 
 
 
 
void main()
{
    patientstruct patientstruct1[maxpatients];
    char entry;
    int count = 0;
    do
    {
        entry = menu();
        switch(entry)
        {        
        case '1':
 
            break;
        case '2':
 
            break;
        case '3':
            displaypatients();
            break;
        case '4':
 
            break;
        case '5':
            addpatient(&patientstruct1,&count);
            break;
        case '6':
 
            break;
        case '7':
 
            break;
        case '8':
 
            break;
        default:
            printf("you're fired");
        }
    }
    while (entry != '7');    
 
 
 
 
 
 
for(;;);
}

chopficaro · #2 10-May-2008, 19:50

yo someone just gave me a hint but they were a little unspecific, he said "it probably didnt clean the buffer between READING the 1st file and inputing the SECOND file"
so how do i do that? FFLUSH(STDIN);? system("cls");?

chopficaro · #3 10-May-2008, 21:45

its also interesting that "numread" returns a zero on the first patient and a 1 on the 2nd patient

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fread/fwrite

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Re: fread/fwrite