将char转成bit，文件读写

好久不写代码，一段将bmp写到mif的小程序花了我好几个小时。以后要多练习啊。
 1 #include <string.h>
 2 #include <stdio.h>
 3 #include <math.h>
 4 
 5 
 6 void main(){
 7     char str[3];
 8     char pos_str[5];
 9 
10     FILE *fp_read;
11     fp_read = fopen("pattern_mem.bmp","r");
12 
13     FILE *fp_write;
14     fp_write = fopen("pattern_rom.mif","w");
15 
16     if(fp_write == NULL || fp_read == NULL)
17     {
18         printf("can't open files!");
19         return ;
20     }
21 
22     char bmp_head[54];
23     //读出BMP头，抛弃不要
24     fread(bmp_head,sizeof(char)*54,1,fp_read);
25     //读出RGB信号，按顺序存入mif文件
26     for(int i = 0 ; i< 28800; i++)
27     {
28         fread(str, 3, 1, fp_read);
29         fprintf(fp_write,"%x:",i);
30 
31         //这里可能大小端有问题
32         int result[24]={0};
33         for(int j = 0 ; j < 8; j++)
34             result[j] = (str[0] & (0x01 << j))?1:0;  
35         for(int m = 0 ; m < 8; m ++)
36             result[8+m] = (str[1] & (0x01 << m))?1:0;
37         for(int n = 0; n < 8 ; n++)
38             result[16+n] = (str[2] & (0x01 << n))?1:0;
39 
40         for(int k = 0; k<24; k++)
41             fprintf(fp_write, "%d",result[k]);
42 
43         fprintf(fp_write,"\n");
44 
45     }
46     fclose(fp_read);
47     fclose(fp_write);
48 
49     return ;
50 }