I'm trying to read a file which has numerous structs which have to be looped through . I've just started coding the fread statements. Each one will need to read through a struct a certain number of times and then I'll probably have to do an fseek.

When not in debug mode, the code runs without error but no data is printed to the file. I am getting this error in debug: "Unhandled exception in file.exe: 0xC0000005: Access Violation.

When I step through it the errors seems to occur during MEMCPY.ASM.

Here is the code with the error line highlighted:

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

struct preRec1 {
char ESTIMATE_NUMBER1[4];
char PAGE_NUMBER1[4];
char PROC_TYPE1[3];
};

struct preRec1a{
char X1[1];
};

struct preRec1b{
char ESTIMATE_NUMBER2[4];
char PAGE_NUMBER2[4];
char PROC_TYPE2[2];
char X2[8];
char PRIORITY[2];
char SALES_TAX[2];
};

struct Rec1 {
char ESTIMATE_NUMBER1[5];
char PAGE_NUMBER1[5];
char PROC_TYPE1[3];
};
struct Rec1a{
char X1[1];
};
struct Rec1b{
char ESTIMATE_NUMBER2[5];
char PAGE_NUMBER2[5];
char PROC_TYPE2[3];
char X2[9];
char PRIORITY[3];
char SALES_TAX[2];
};

void main(void)
{
FILE *f, *f2, *f3; // *f4, *f5;

struct preRec1 pr1;
struct preRec1a pr1a;
struct preRec1b pr1b;

struct Rec1 r1;
struct Rec1a r1a;
struct Rec1b r1b;

f = fopen("ESTINDEX", "rb");
f2 = fopen("ESTINDEX_R1_OUT", "wb");
f3 = fopen("ESTINDEX_R2_OUT", "wb");

memset(&r1, 0x0, sizeof(r1));

while (fread(&pr1, sizeof(struct preRec1), 22, f))
{
memcpy(&r1.ESTIMATE_NUMBER1, &pr1.ESTIMATE_NUMBER1, sizeof(r1.ESTIMATE_NUMBER1));
memcpy(&r1.PAGE_NUMBER1, &pr1.PAGE_NUMBER1, sizeof(r1.PAGE_NUMBER1));
memcpy(&r1.PROC_TYPE1, &pr1.PROC_TYPE1, sizeof(r1.PROC_TYPE1));
fprintf(f2, "%s|", r1.ESTIMATE_NUMBER1);
fprintf(f2, "%s|", r1.PAGE_NUMBER1);
fprintf(f2, "%s\n", r1.PROC_TYPE1);
}

fclose(f);
printf("All Done\n");

}

Once the error line is hit I am taken to the disassembly: 393335FF ?.

What does this mean?

Thanks, cj