学生成绩管理系统(带文件的保存的)

#include<stdio.h>
#include<stdlib.h>
#include<conio.h>
#define SIZE 4
struct student
{
char name[10];
char come[10];
char sex[10];
char politics[10];
char interest[15];
int num[10];
int con;
int score[3];
float ave;
}stu[SIZE],work;
void main()
{
void Welcome();
void rang();
void delet();
FILE *fp1,*fp2,*fp3;int i,j,sum;
for(i=0;i<SIZE;i++)
{
printf("\n***************************************\n"); printf("\ninput score of student %d: \n",i+1);
printf("name:");
scanf("%s",stu[i].name);
printf("come:");
scanf("%s",stu[i].come);
printf("sex:");
scanf("%s",stu[i].sex);
printf("politics:");
scanf("%s",stu[i].politics);
printf("interest:");
scanf("%s",stu[i].interest);
printf("NO.:");
scanf("%s",stu[i].num);
sum=0;
for(j=0;j<3;j++)
{
printf("score %d: ",j+1);
scanf("%d",&stu[i].score[j]);
sum+=stu[i].score[j];}
stu[i].ave=sum/5.0;
}
fp1=fopen("x.txt","wb");
for(i=0;i<SIZE;i++)
if(fwrite(&stu[i],sizeof(struct student),1,fp1)!=1)
{
printf("file write error\n");
}
fclose(fp1);
fp1=fopen("x.txt","rb");
printf("the orginal data is\n");
for(i=0;i<SIZE;i++)
{
fread(&stu[i],sizeof(struct student),1,fp1);
printf("%-10s %-10s %-5s %-15s %-15s %3s %7d %7d %7d %7d %7d %8.2f\n",
stu[i].name,stu[i].come,stu[i].sex,stu[i].politics,stu[i].interest,stu[i].num,
stu[i].score[0],stu[i].score[1],stu[i].score[2],stu[i].score[3],stu[i].score[4],stu[i].ave);
}
rang();
fp2=fopen("x1.txt","rb");
printf("the score as follow\n");
for(i=0;i<SIZE;i++)
{
fread(&stu[i],sizeof(struct student),1,fp1);
printf("%-10s%-10s %-5s %-15s %-15s %3s %7d %7d %7d %7d %7d %8.2f\n",stu[i].name,stu[i].nu m,
stu[i].politics,stu[i].interest,
stu[i].score[0],stu[i].score[1],stu[i].score[2],stu[i].score[3],stu[i].score[4],stu[i].ave);
}
fclose(fp2);
delet();
fp3=fopen("x1.txt","rb");
fclose(fp3);
}
void Welcome()
{
system("clr");
printf("Welcome to use this project");
printf("please input: ");
}
void rang()
{
FILE *fp1,*fp2;
int i,j;
if ((fp1=fopen("x.txt","rb"))==NULL)
{
printf("This file can not open\n");
exit(0);
}
if((fp2=fopen("x1.txt","wb"))==NULL)
{
printf("The file write error\n");
exit(0);
}
for(i=0;i<SIZE;i++)
if(fread(&stu[i],sizeof(struct student),1,fp1)!=1) {
printf("file read error\n");
exit(0);
}
for(i=0;i<SIZE;i++)
{
for(j=i+1;j<SIZE;j++)
if(stu[i].ave<stu[j].ave)
{
work=stu[i];stu[i]=stu[j];stu[j]=work;
}
fwrite(&stu[i],sizeof(struct student),1,fp2);
}
fclose(fp1);
fclose(fp2);
}
void delet()
{
FILE *fp;
int i,j,n;
if((fp=fopen("x1.txt","rb"))==NULL)
{
printf("can not open file\n");
exit(0);
}
printf("\n");
fclose(fp);
n=i;
for(i=0;i<n;i++)
{
for(j=0;j<5;j++)
{
if(stu[i].score[j]<60) stu[i].con++;
}
}
if((fp=fopen("x1.txt","wb"))==NULL)
{
printf("can not open file\n");
exit(0);
}
printf("the data accorded with the demond is\n");
for(i=0;i<n;i++)
{
if(stu[i].con<4)
{
if(fwrite(&stu[i],sizeof(struct student),1,fp)!=1)
printf("error/n");
printf("%-10s%-10s%-5s%-15s%-15s%3s%7d%7d%7d%7d%7d %8.2f\n",
stu[i].name,stu[i].come,stu[i].sex,stu[i].politics,stu[i].interest,stu[i].num,
stu[i].score[0],stu[i].score[1],stu[i].score[2],stu[i].score[3],stu[i].score[4],stu[i].ave);
}
}
fclose(fp);
}。