test--C二进制文件读取-2008.12.10号

//IDE: Visual Studio 2008
#include "stdafx.h"
#include <string.h>

const int nmemb = 3;

struct test
{
      char name[20];
      int size;
}s[nmemb];

void set_s(int x, char* y){
     strcpy(s[x].name, y);
     s[x].size = strlen(y);
}

int _tmain(int argc, _TCHAR* argv[])
{
      FILE * stream; 
      int i;
      set_s(0,"Linux!");
      set_s(1,"FreeBSD!");
      set_s(2,"Windows2000.");
      for(i=0;i<nmemb;i++)
           printf("name[%d]=%-20s:size[%d]=%d\n",i,s[i].name,i,s[i].size); 
      //tmp为工程目录下手工建立的一个文件夹
      stream = fopen("./tmp/testFile","w");
      if(stream == NULL){
           printf("fopen (to write) failed...\n");
           return -1;
      }
      fwrite(s,sizeof(struct test),nmemb,stream); 
      fclose(stream);

      stream = fopen("./tmp/testFile","r");
      if(stream == NULL){
           printf("fopen (to read) failed...\n");
           return -1;
      }
      fread(s,sizeof(struct test),nmemb,stream);
      fclose(stream);
      for(i=0;i<nmemb;i++)
           printf("name[%d]=%-20s:size[%d]=%d\n",i,s[i].name,i,s[i].size);

      return 0;
}