新手求教，结构体在文件之间调用的问题

Question

//main.c
#include
#include
#include"Dfile.h"

void main()
{
int i;
biaozhun_in.shui=0;
biaozhun_in.dian=0;
puts("水电标准：");
scanf("%lf %lf",&biaozhun_in.shui,&biaozhun_in.dian);

puts("水电耗：");
for(i=0;i {
scanf("%d %d %d",&charge_in[i].hu,&charge_in[i].shuihao,&charge_in[i].dianhao);
}
write();
}
//输入输出.c
#include
#include
#include"Dfile.h"
extern struct charge_type charge_in[SIZE];
extern struct biaozhun_type biaozhun_in;
void write()
{
FILE * in;
int i;
if((in=fopen("input.dat","wb"))==NULL)
{
printf("无法写入\n");
return;
}
if(fwrite(&biaozhun_in,sizeof(biaozhun_type),1,in)!=1)
printf("error!");

for(i=0;i {
if(fwrite(&charge_in[i],sizeof(struct charge_type),1,in)!=1)
printf("error!");
}
fclose(in);
}
//Dfile.h
#include
#include
#define SIZE 6

struct charge_type
{
int hu;
int shuihao;
int dianhao;
}charge_in[SIZE];

struct biaozhun_type
{
double shui;
double dian;
}biaozhun_in;

void write(void);
void read(void);

Answer 1

结构体定义在头文件，然后多个文件包含头文件