打印文件的二进制（C代码）

打印文件的二进制格式，C代码：
 1 #include <stdio.h>
 2 
 3 unsigned char buff[1024];
 4 
 5 void print_bin(unsigned char *buff, int i)
 6 {
 7     int shirt = 128;
 8     for (int k = 0; k < 8; k++) {
 9         if (shirt & buff[i]) {
10             printf("1");
11         }
12         else
13             printf("0");
14         shirt = shirt >> 1;
15     }
16 }
17 
18 int main(int argc, char ** argv)
19 {
20     if (argc < 2) {
21         printf("please input the file name!\n");
22         return 0;
23     }
24     FILE * fp = fopen(argv[1], "rb");
25     int len = 0;
26     int acc = 0;
27     while ((len = fread(buff, 1, 1024, fp)) > 0) {
28         printf("%d\n", len);
29         for (int i = 0; i < len; i++) {
30             print_bin(buff, i);
31             printf(" ");
32             acc++;
33         }
34         if (acc % 10 == 0) printf("\n");
35     }
36     printf("\n");
37     fclose(fp);
38     return 0;
39 }