第十四章结构和其他数据形式

关于fread以及fwrite

• fread(char* buff,int size,int count,FILE* fp)
• fwrite(char* buff,int size,int count,FILE* fp)

#include<stdio.h>#include<string.h>typedef struct book_s{ int count; char name[100]; char author[100]; float price;}Book;int main(){   Book books[3] ;   strcpy(books[0].name,"liuchuanwu0" );   strcpy(books[0].author,"liu chuan wu 0");   books[0].price = 1.00;   strcpy(books[1].name,"liuchuanwu1" );   strcpy(books[1].author,"liu chuan wu 1");   books[1].price = 1.00;   strcpy(books[2].name,"liuchuanwu2" );   strcpy(books[2].author,"liu chuan wu 2");   books[2].price = 1.02;   FILE * fp =fopen("./book.list","a+");   int index ;  for(index=0;index<3;index++)  {   fwrite(&books[index],sizeof(Book),1,fp);  }  memset(&books[2],0,sizeof(Book));  printf("%s \n",books[2].name);  rewind(fp) ;  fread(&books[2],sizeof(Book),1,fp);  printf("%s \n",books[2].name);}

结果如下：–结构体可以正常的转存入文件，且vim查看存在乱码，但是可以正常的读写 
linux:/home/lcw/code # ./a.out

liuchuanwu0 
linux:/home/lcw/code # cat book.list 
p?Kliuchuanwu0¢ÿÿÿÿ¢p¢¢D.ι 
¶?¸@ 
liu chuan wu 0?h¢.N=