一个关于文件读写的操作，谁能帮我看下哪错了？

love_xn

char  ** arr,str1[1000];
unsigned int total;
FILE * fp;
char *ptr;
fp=fopen("password","r");
fread(ptr,sizeof(fp),1,fp);
fclose(fp);
printf("%s",ptr);
arr=explode(ptr,"\n",&total);
fp=fopen("password","w");
strcpy(str1,arr[0]);
strcat(str1,md5("passwdnew"));
fwrite(str1,1000,1,fp);
fclose(fp);

b46

晕了

b46

1. SYNOPSIS
   
2.        #include <stdio.h>
   
3. 
   
4.        size_t fread(void *ptr, size_t size, size_t nmemb, FILE *stream);
   
5. 
   
6.        size_t   fwrite(const  void  *ptr,  size_t  size,  size_t  nmemb,  FILE
   
7.        *stream);
   
8. 
   
9. DESCRIPTION
   
10.        The function fread reads nmemb elements of data, each size bytes  long,
    
11.        from  the  stream  pointed  to  by stream, storing them at the location
    
12.        given by ptr.
    
13. 
    
14.        The function fwrite writes nmemb elements  of  data,  each  size  bytes
    
15.        long, to the stream pointed to by stream, obtaining them from the loca-
    
16.        tion given by ptr.
    
17. 
    
18.        For non-locking counterparts, see unlocked_stdio(3).
    

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love_xn

我是用CGI写网页的，C里面有fread(),fwrite函数，还需要像unix C一样写类型吗？