Thread: Comparing two elements in different arrays of structs?

I have two files, `cars.txt` and `reservation.txt`, both of the files have `resID` in common.


I want the user to enter a date, use that date to see the cars that are **unavailable**, then print them (through `resID`).


car.txt:
(From left to right: `reservationID`, `carID`, `carYOM`, `carMake`, `carModel`, `carFuel`, `catagory`.)

Code:

    R001;V001;2003;Toyota;Camry;Petrol;Budget
    R002;V002;2005;Toyota;Prius;Petrol;Economy
    R003;V003;1999;Ford;Falcon;Petrol;Midsize
    R004;V004;2007;Ford;Territory;Diesel;Fullsize
    R005;V005;2010;Ferrari;599;Petrol;Fullsize
    R006;V006;1998;Holden;Comadore;Diesel;Midsize
    R007;V007;2008;Honda;Civic;Petrol;Budget
    R008;V008;2000;Mazda;MX5;Petrol;Economy

reservation.txt:
(From left to right: `reservationID`, `customerID`, `reservationStartDate`, `reservationStartTime`, `reservationEndDate`, `reservationEndTime`.)

Code:

    R001;C005;2012/02/12;09:15A.M;2012/03/15;05:00P.M
    R002;C002;2012/04/15;10:00A.M;2012/04/22;10:30A.M
    R003;C003;2012/01/16;02:11P.M;2012/04/15;12:00P.M
    R004;C004;2012/05/05;03:00P.M;2012/05/08;10:40A.M
    R005;C005;2012/05/15;10:00A.M;2012/04/23;05:00P.M
    R006;C006;2012/04/11;05:30P.M;2012/04/15;10:00A.M
    R007;C008;2012/05/15;03:15P.M;2012/05/18;11:00A.M
    R008;C007;2012/04/15;11:40P.M;2012/04/23;09:00A.M

The code in question:

Code:

    #include <stdio.h>
    #include <string.h>
    #define MAX_CAR 100
    #define MAX_RES 100
    
    int main(){
        
        typedef struct{                    //car struct
            char reservationID[20];
            char carID[20];
            char carYOM[20];
            char carMake[20];
            char carModel[50];
            char carFuel[20];
            char catagory[20];
        } car_t;
        
        typedef struct{                    //res struct
            char reservationID[20];
            char customerID[20];
            char reservationStartDate[20];
            char reservationStartTime[20];
            char reservationEndDate[50];
            char reservationEndTime[20];
        } res_t;
        
        car_t car[MAX_CAR];                //car array
        res_t reservation[MAX_RES];        //res array
        FILE *carHandle;
        FILE *resHandle;
        char line[100];
        char *item;
        int rescount = 0;
        int carcount =0;
        int k;
        int i;
        int option;
        char choice[20];    
        
        resHandle = fopen("reservation.txt","r");    
        
        while (fgets(line, 99, resHandle)){
          //cut up the reservation file line by line and put the bits into the res array.
            item = strtok(line,";");
            strcpy(reservation[rescount].reservationID,item);
            item = strtok(NULL,";");
            strcpy(reservation[rescount].customerID,item);
            item = strtok(NULL,";");
            strcpy(reservation[rescount].reservationStartDate,item);
            item = strtok(NULL,";");
            strcpy(reservation[rescount].reservationStartTime,item);
            item = strtok(NULL,";");
            strcpy(reservation[rescount].reservationEndDate,item);
            item = strtok(NULL,"\n");
            strcpy(reservation[rescount].reservationEndTime,item);
            rescount++;
        }
        
        fclose(resHandle);
        
        carHandle = fopen("car.txt","r");    
        
        while (fgets(line, 99, carHandle)){
            //cut up the car file line by line and put the bits into the car array.
            item = strtok(line,";");
            strcpy(car[carcount].reservationID,item);
            item = strtok(NULL,";");
            strcpy(car[carcount].carID,item);
            item = strtok(NULL,";");
            strcpy(car[carcount].carYOM,item);
            item = strtok(NULL,";");
            strcpy(car[carcount].carMake,item);
            item = strtok(NULL,";");
            strcpy(car[carcount].carModel,item);
            item = strtok(NULL,";");
            strcpy(car[carcount].carFuel,item);
            item = strtok(NULL,"\n");
            strcpy(car[carcount].catagory,item);
            carcount++;
        }
        
        fclose(carHandle);
        
        printf("Enter todays date (in YYYY/MM/DD format):");
        scanf("%s", choice);
        for (k=0;k<=rescount; k++){
            if (strcmp(choice,reservation[k].reservationStartDate)>=0 && strcmp(choice,reservation[k].reservationStartDate)>=0){
                for (i=0;i<=carcount; i++){
                    if (strcmp(car[i].reservationID,reservation[i].reservationID)==0){
                        printf("\nreservationID: %s\nreservationStartTime: %s\ncustomerID: %s\ncarid: %s\nyom: %s\nmake: %s\nmodel: %s\nfueltype: %s\ncategory: %s\n\n", car[k].reservationID, reservation[i].reservationStartTime, reservation[i].customerID, car[k].carID, car[k].carYOM, car[k].carMake, car[k].carModel, car[k].carFuel, car[k].catagory);
                        goto outofloop;
                    }
                }
            }else printf("\nall the cars are available\n");
            break;
        }
        outofloop:
    
        return(0);
    }

Currently the code only works with input strings '2012/02/12' to '2012/03/15' (i.e the first line of the reservation file)


Any other input string will not get past the first if statement.


Any help would be very appreciated!

Originally Posted by Salem

You've already got a thread making progress here -> Foreign Keys Using Array Of Structs In C. - C And C++ | Dream.In.Code

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