C语言图片转化数组

#include<stdio.h>
#include<fcntl.h>


int
main()
{

//计算图片大小
        int fd = open("n18.gif", O_RDONLY);
        long fsize = lseek(fd, 0L, SEEK_END);
        char byteSize[fsize];
        FILE *fp;


//将图片转化为数组
        fp = fopen("n18.gif", "rb");
        fread(byteSize, 1, fsize, fp);
        fclose(fp);
        close(fd);
        //printf("%ld\n", fsize);


        //printf("%ld\n",sizeof(byteSize));

        //printf("%c\n",byteSize[0]);

//将数组转化为图片
        fd = open("n19.gif", O_WRONLY|O_CREAT);
        write(fd, byteSize,sizeof(byteSize));
        close(fd);



        return 0;
}