比较两个文件是否相同（C/C++语言）

 #include <stdio.h>
 #include <string.h>
 const int max_r = ;

 // Calculate the file size
 void Get_file_size(char *name_1, char *name_2)
 {
     FILE *fp_1 = fopen(name_1, "r");
     FILE *fp_2 = fopen(name_2, "r");
     if (fp_1)
     {
         printf ("Size of %s : ", name_1);
         fseek(fp_1, ,  SEEK_END);
         if (.*ftell(fp_1)/(**) > 1.0)
                printf("%.1f GB\n", .*ftell(fp_1)/(**));
            else if(.*ftell(fp_1)/(*) > 1.0)
                printf("%.1f MB\n", .*ftell(fp_1)/(*));
            else if (.*ftell(fp_1)/() > 1.0)
                printf("%.1f KB\n", .*ftell(fp_1)/());
            else printf ("%d Bt\n", ftell(fp_1));
         fclose(fp_1);
     }
     if (fp_2)
     {
         printf ("Size of %s : ", name_2);
         fseek(fp_2, ,  SEEK_END);
         if (.*ftell(fp_2)/(**) > 1.0)
                printf("%.1f GB\n", .*ftell(fp_2)/(**));
            else if(.*ftell(fp_2)/(*) > 1.0)
                printf("%.1f MB\n", .*ftell(fp_2)/(*));
            else if (.*ftell(fp_2)/() > 1.0)
                printf("%.1f KB\n", .*ftell(fp_2)/());
            else printf ("%d Bt\n", ftell(fp_2));
         fclose(fp_2);
     }
     return;
 }

 int main()
 {
     int AC, line_1, line_2;
     char name_1[], name_2[];
     char ch_1[max_r], ch_2[max_r];

     scanf ("%s%s", name_1, name_2);//input two file which need to be compared
     AC = ;
     line_1 = line_2 = ;
     Get_file_size(name_1, name_2);

     FILE *fp_1 = fopen(name_1, "r");
     FILE *fp_2 = fopen(name_2, "r");
     while()
     {
         char *end_1, *end_2;
         end_1 = fgets(ch_1, max_r, fp_1);
         end_2 = fgets(ch_2, max_r, fp_2);
         if (end_1 != NULL)
             line_1 ++;
         if (end_2 != NULL)
             line_2 ++;
         while(strcmp(ch_1, "\n") ==  && end_1 != NULL)
         {
             end_1 = fgets(ch_1, max_r, fp_1);
             if (end_1 != NULL)
                 line_1 ++;
         }
         while(strcmp(ch_2, "\n") ==  && end_2 != NULL)
         {
             end_2 = fgets(ch_2, max_r, fp_2);
             if (end_2 != NULL)
                 line_2 ++;
         }
         if (end_1 == NULL && end_2 == NULL)
             break;
         if(strcmp(ch_1, ch_2) != )
         {
             AC = ;
             ch_1[strlen(ch_1) -] = '\0';
             ch_2[strlen(ch_2) -] = '\0';
             printf ("    Worry Answer\n");
             printf ("In file %s at %d line << %s >> difference from\n", name_1, line_1, ch_1);
             printf ("In file %s at %d line << %s >>\n", name_2, line_2, ch_2);
             break;
         }
     }
     if (AC)
     {
         if (line_1 != line_2)
         {
             printf ("    Print Error\n");
             printf ("The print not in a canonical format!\n");
             printf ("the %s have %d lines \nbut %s have %d lines!\n", name_1, line_1, name_2, line_2);
         }
         else
             printf ("    Aceept\n", line_1, line_2);
     }
     fclose(fp_1);
     fclose(fp_2);
     return ;
 }