文件操作：输出文件二进制数据

#include <stdio.h>

int main(int argc, char *argv[])
{
    int i;
    FILE *fp = NULL;
    unsigned char *pData;
    int iLen, itmpLen, itmp;

    fp = fopen(argv[1], "rb");
    if(fp == NULL)
    {
        printf("fopen err\n");
        goto end;
    }
    fseek(fp, 0, SEEK_END);
    iLen = ftell(fp);
    if(iLen <= 0)
    {
        printf("file size err: %d\n", iLen);
        goto end;
    }
    printf("file size: %d\n", iLen);

    pData = malloc(iLen);
    if(pData == NULL)
    {
        printf("pData malloc err\n");
        goto end;
    }

    //fseek(fp, 0, SEEK_SET);
    fclose(fp);
    fp = fopen(argv[1], "rb");
    if(fp == NULL)
    {
        printf("fopen err\n");
        goto end;
    }
    itmpLen = 0;
    while(itmpLen < iLen)
    {
        itmp = fread(pData+itmpLen, 1, iLen, fp);
        printf("itmp = %d\n", itmp);
        itmpLen += itmp;
    }
    for(i = 0; i < iLen; i++)
    {
        if(i != 0 && i % 16 == 0)
            printf("\n");
        printf("0x%02x, ", pData[i]);
    }
    printf("\n");
    fclose(fp);
end:
    return 0;
}