fwrite.c

来自「自己编写的ARM处理器的指令集仿真」· C语言 代码 · 共 31 行

#include <stdio.h>
#define set_s(x,y) {strcpy(s[x].name,y);s[x].size=strlen(y);}
#define nmemb 3
struct test
{char name[20];
 int size;
}s[nmemb];

main()
{FILE *stream;
 int i;
 set_s(0,"Linux!");
 set_s(1,"FreeBSD!");
 set_s(2,"Windows2000");
 stream=fopen("a7.c","w");
	printf("1. %s\n",s[0].name);
	printf("2. %s\n",s[1].name);
	printf("3. %s\n",s[2].name);
 printf("fwrite<<<<<<<<<<<\n");
 fwrite(s,sizeof(struct test),nmemb,stream);
 printf("fwrite>>>>>>>>\n");
 fclose(stream);
 stream=fopen("a7.c","r");
 printf("fread<<<<<<<<<\n");
 fread(s,sizeof(struct test),nmemb,stream);
 printf("fread>>>>>>>>>\n");
 fclose(stream);
 for(i=0;i<nmemb;i++)
   printf("name[%d]=%-20s:size[%d]=%d\n",i,s[i].name,i,s[i].size);
}