#include
#include
#include
#define N 20
#define M 20
struct student
{char num[20];
char name[10];
float dietfee;
};
struct diet
{char date[20];
char breakfast[100];
char lunch[100];
char supper[100];
};
void menu();
void reads();
void readss();
void addstudent();
void adddiet();
void addfee();
void query();
void show();
void dele();
void midefy();
void main()
{
int n;
while(1)
{
menu();
printf("\n 请输入您要选择的操作序号：");
scanf("%d",&n);
switch(n)
{case 1: addstudent();break;
case 2: show();break;
case 3: adddiet();break;
case 4: addfee();break;
case 5: query();break;
case 6: dele();break;
case 7: midefy();break;
case 8: exit(0);
default: printf("输入错误！\n ");
}
}
}
void menu()
{printf(" **************************** 食堂就餐餐费管理系统************************ ");
printf("\n 1 添加学生信息");
printf("\n 2 显示学生信息");
printf("\n 3 添加食谱信息");
printf("\n 4 按学号添加餐费");
printf("\n 5 查询某日食谱");
printf("\n 6 删除学生信息");
printf("\n 7 修改学生信息");
printf("\n 8 退出");
}
void reads(struct student stu[N],int *n) //读取学生信息文件
{
FILE *fp;
int i=0;
if((fp=fopen("studenttt.txt","rb"))==NULL)
{ printf("文件打开失败！\n");
return;
}
else
{
*n=getw(fp);
for(i=0;i<*n;i++)
fread(&stu[i],sizeof(struct student),1,fp);
}
fclose(fp);
}
void addstudent() //添加学生信息
{FILE *fp;
int n,i,j;
struct student stu;
if((fp=fopen("studenttt.txt","rb+"))!=NULL) //读写
{j=getw(fp);
rewind(fp);
printf("请输入要添加的学生数量：");
scanf("%d",&n);
putw(j+n,fp);
fseek(fp,0L,2); //移动位置指针
for(i=1;i<=n;i++)
{ printf("\n请输入第%d个学生的学号和姓名：\n",i);
scanf("%s%s",stu.num,stu.name);
printf("\n请输入第%d个学生的总餐费：\n",i);
scanf("%f",&stu.dietfee);
fwrite(&stu,sizeof(struct student),1,fp); //向文件写一组数据
}
}
else //文件不存在时，新建一个文件，并将数据写入该文件
{
if((fp=fopen("studenttt.txt","wb"))!=NULL) //只写
{
printf("请输入要添加的学生数量：");
scanf("%d",&n);
putw(n,fp);
for(i=1;i<=n;i++)
{ printf("\n请输入第%d个学生的学号和姓名：\n",i);
scanf("%s%s",stu.num,stu.name);
printf("\n请输入第%d个学生的总餐费：\n",i);
scanf("%f",&stu.dietfee);
fwrite(&stu,sizeof(struct student),1,fp);
}
}
}
fclose(fp);
}
void readss(struct diet die[M],int *t) //读取食谱文件
{
FILE *fp2;
int i=0;
if((fp2=fopen("diet.txt","rb"))==NULL)
{ printf("文件打开失败！\n");
return;
}
else
{
*t=getw(fp2);
for(i=0;i<*t;i++)
fread(&die[i],sizeof(struct diet),1,fp2);
}
fclose(fp2);
}
void adddiet() //添加食谱信息
{FILE *fp2;
int n,i,j;
struct diet die;
if((fp2=fopen("diet.txt","rb+"))!=NULL)
{j=getw(fp2);
rewind(fp2);
printf("请输入要添加的食谱数量：");
scanf("%d",&n);
putw(j+n,fp2);
fseek(fp2,0L,2);
for(i=1;i<=n;i++)
{ printf("\n请输入第%d个食谱的日期：\n",i);
scanf("%s",die.date);
printf("\n请输入第%d个食谱的早餐和费用，午餐和费用，晚餐和费用：\n",i);
scanf("%s%s%s",&die.breakfast,&die.lunch,&die.supper);
fwrite(&die,sizeof(struct diet),1,fp2);
}
}
else //文件不存在时，新建一个文件，并将数据写入该文件
{
if((fp2=fopen("diet.txt","wb"))!=NULL)
{
printf("请输入要添加的食谱数量：");
scanf("%d",&n);
putw(n,fp2);
for(i=1;i<=n;i++)
{ printf("\n请输入第%d个食谱的日期：\n",i);
scanf("%s",die.date);
printf("\n请输入第%d个食谱的早餐和费用，午餐和费用，晚餐和费用：\n",i);
scanf("%s%s%s",&die.breakfast,&die.lunch,&die.supper);
fwrite(&die,sizeof(struct diet),1,fp2);
}
}
}
fclose(fp2);
}
void show() //显示学生信息
{struct student stu[N];
int i,n;
reads(stu,&n);
if(n==0)
return;
for(i=0;i=n)
{printf("无此学生信息!\n");
return;
}
printf("\n请输入增加该学生的餐费数：\n");
scanf("%f",&g);
stu[i].dietfee+=g;
/*strcpy(stu[i].dietfee,temp.dietfee);*/
if((fp=fopen("studenttt.txt","wb"))==NULL)
{printf("打开文件失败！");
return;
}
putw(n,fp);
for(i=0;i=n)
{printf("没有找到该日食谱信息！\n");
return;
}
else
printf("\n 日期：%s早餐%s：午餐：%s晚餐：%s\n",die[i].date,die[i].breakfast,die[i].lunch,die[i].supper);
}
void dele() //删除学生信息
{
struct student stu[N];
struct student stu2[N];
int i,n,m,s;
FILE *fp;
int j;
char num2[20];
printf("请输入要删除的学生学号：");
scanf("%s",&num2);
reads(stu,&n);
if(n==0)
{
printf("没有学生可以删除！");
return;
}
for(m=0,i=0;i
