Thread: Linked List Print Error with Time Functions

The program crashes when printing the timestamp. I believe the error is located in the function void flightRec_PrflightRecData(flightRecRead* thisFlight) which is designed to do three things:

1. declare the time struct flighttime, flighttime is in POSIX format.
2. Localtime converts the POSIX time to a human-readable time.
3. The fourth specifier prints the converted time using asctime which prints it in Www Mmm dd hh:mm:ss yyyy format.

The error is tb != NULL and shows other information specifying asctime. I am using Visual Studio 2013 Desktop Edition. This is for an intro to C class.

What I have done to troubleshoot:
1. Check for time header
2. Checked pointers and addresses
3. Turned deprecation off
4. Checked the format specifier

The program crash persists.

Any assistance is appreciated. Thank you.

Code:

Code:

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




typedef struct flightRec_struct { // declare a struct to match the format of the binary data
    char FlightNum[7];
    char OriginAirportCode[5];
    char DestAirportCode[5];
    int  timestamp;
} flightRec;


typedef struct flightRecRead_struct { // declare a struct to match the format of your linked list
    char FlightNum[7];
    char OriginAirportCode[5];
    char DestAirportCode[5];
    int  timestamp;
    struct flightRec* nextFlight_ptr;
} flightRecRead;






// Print dataVal
void flightRec_PrflightRecData(flightRecRead* thisFlight) {
    struct tm *flightTime;
    flightTime = localtime(&thisFlight->timestamp);
    printf("%s \t %s \t %s \t %s\n", thisFlight->FlightNum, thisFlight->OriginAirportCode,
        thisFlight->DestAirportCode, asctime(flightTime));
    return;
}


// Grab location pointed by nextFlight_ptr
flightRecRead* flightRec_GetNext(flightRecRead* thisFlight) {
    return thisFlight->nextFlight_ptr;
}


int main(void) {
    flightRec firstStruct;
    flightRecRead* headObj = NULL;
    flightRecRead* currObj = NULL;
    flightRecRead* tailObj = NULL;
    struct tm *flightTime;
    int i = 0;                               //loop index




    FILE* inFile = NULL;
    inFile = fopen("acars.bin", "rb");
    if (inFile == NULL) {
        printf("Could not open file acars.bin.\n");
        return -1;
    }


    if (!feof(inFile)) {
        fread(&firstStruct, sizeof(flightRec), 1, inFile); // 2. read the file into that struct


        headObj = (flightRecRead*)malloc(sizeof(flightRecRead)); // 3. make head point to that struct
        strcpy(headObj->FlightNum, firstStruct.FlightNum);
        strcpy(headObj->OriginAirportCode, firstStruct.OriginAirportCode);
        strcpy(headObj->DestAirportCode, firstStruct.DestAirportCode);
        headObj->timestamp = firstStruct.timestamp;


        tailObj = (flightRecRead*)malloc(sizeof(flightRecRead));  // 4. make tail point to that struct
        strcpy(tailObj->FlightNum, firstStruct.FlightNum);
        strcpy(tailObj->OriginAirportCode, firstStruct.OriginAirportCode);
        strcpy(tailObj->DestAirportCode, firstStruct.DestAirportCode);
        tailObj->timestamp = firstStruct.timestamp;
        headObj->nextFlight_ptr = tailObj;
        tailObj->nextFlight_ptr = NULL;
    }


    while (!feof(inFile)) {                       // 5. while not end-of-file on the acars file:
        fread(&firstStruct, sizeof(flightRec), 1, inFile); // 6. malloc a new struct
        currObj = (flightRecRead*)malloc(sizeof(flightRecRead));
        strcpy(currObj->FlightNum, firstStruct.FlightNum);
        strcpy(currObj->OriginAirportCode, firstStruct.OriginAirportCode);
        strcpy(currObj->DestAirportCode, firstStruct.DestAirportCode);
        currObj->timestamp = firstStruct.timestamp;
        currObj->nextFlight_ptr = NULL;


        tailObj->nextFlight_ptr = currObj;
        tailObj = currObj;
    }




    currObj = headObj;                           // Print the list
    printf("FlightNum \t OriginAirportCode \t DestAirportCode \t Time \t \n");
    while (currObj != NULL) {
        flightRec_PrflightRecData(currObj);
        currObj = flightRec_GetNext(currObj);
    }


    system("pause"); //return 0;
}

Here too: c - Linked List Print Error Using Time Functions - Stack Overflow