Hi,

I have a structure with the following definition:

typedef struct myStruct{
    int a;
    char* c;
    int f;
} OBJECT;

I am able to populate this object and write it to a file. However I am not able to read the char* c value in it...while trying to read it, it gives me a segmentation fault error. Is there anything wrong with my code:

//writensave.c

#include "mystruct.h"
#include <stdio.h>
#include <string.h>


#define p(x) printf(x)

int main()
{
    p("Creating file to write...\n");
    FILE* file = fopen("struct.dat", "w");
    if(file == NULL)
    {
        printf("Error opening file\n");
        return -1;
    }

    p("creating structure\n");
    OBJECT* myObj = (OBJECT*)malloc(sizeof(OBJECT));
    myObj->a = 20;
    myObj->f = 45;
    myObj->c = (char*)calloc(30, sizeof(char));
    strcpy(myObj->c, 
        "This is a test");
    p("Writing object to file...\n");
    fwrite(myObj, sizeof(OBJECT), 1, file);
    p("Close file\n");
    fclose(file);
    p("End of program\n");
    return 0;       
}

Here is how I am trying to read it:

//readnprint.c
#include "mystruct.h"
#include <stdio.h>
#define p(x) printf(x)
int main()
{   
    FILE* file = fopen("struct.dat", "r");
    char* buffer;
    buffer = (char*) malloc(sizeof(OBJECT));
    if(file == NULL)
    {
        p("Error opening file");
        return -1;
    }

    fread((void *)buffer, sizeof(OBJECT), 1, file);
    OBJECT* obj = (OBJECT*)buffer;
    printf("obj->a = %d\nobj->f = %d \nobj->c = %s",
        obj->a,
        obj->f,
        obj->c);
    fclose(file);
    return 0;
}