代码如下：
for(i=0;i<66;i++)
printf("*");
printf("\n");
printf("1.Input record\n");
printf("2.Caculate totel and average score of every course\n");
printf("3.Caculate totel and average score of every student\n");
printf("4.Sort in descending order by total score of every student\n");
printf("5.Sort in ascending order by total score of every student\n");
printf("6.Sort in ascending order by number\n");
printf("7.Sort in ascending order by name\n");
printf("8.Search by number\n");
printf("9.Search by name\n");
printf("10.Statistic analysis for every course\n");
printf("11.List record\n");
printf("12.Write to a file\n");
printf("13.Read from a file\n");
printf("0.Exit\n");
for(i=0;i<66;i++)
printf("*");
printf("\n");
printf("Please enter your choice:");
printf("\n");
输入函数：
void Readscore (STU stu[],int n,int m) //1.输入数据
{
int i,j;
for(i=0;i<n;i++)
{
printf("Input student's ID ,name and score");
scanf("%ld",&stu[i].studentID);
scanf("%s",stu[i].studentName);
for(j=0;j<m;j++)
scanf("%d",&stu[i].score[j]);
}
}
数据处理函数：
void Tota (STU stu[],int n,int m) //2.计算每门课程的总分和平均分
{
int i,j,sum[M];
double ave[M];
for(j=0;j<m;j++)
{
sum[j]=0;
for(i=0;i<n;i++)
{
sum[j]=sum[j]+stu[i].score[j];
}
ave[j]=(double)sum[j]/n;
}
for(i=0;i<m;i++)
printf("Project %d 总分=%d,课程的平均分=%f\n",i+1,sum[i],ave[i]);
}
void Datasort_1 (STU stu[],int n,int m) //3.计算每个学生的总分和平均分
{
int i,j,sum[N];
double ave[N];
for(i=0;i<n;i++)
{
sum[i]=0;
for(j=0;j<m;j++)
{
sum[i]=sum[i]+stu[i].score[j];
}
ave[i]=(double)sum[i]/m;
}
for(i=0;i<n;i++)
printf("ID:%10ld,Name: %s Allscore=%d,The ave=%f\n",stu[i].studentID,stu[i].studentName,sum[i],ave[i]);
}
排序函数：
void Datasort_2 (STU stu[],int n,int m) //4.按每个学生的总分由高到低排出名次表
{
int i,j,k,h,sum[N];
STU t;
for(i=0;i<n;i++)
{
sum[i]=0;
for(j=0;j<m;j++)
{
sum[i]=sum[i]+stu[i].score[j];
}
}
for(i=0;i<n;i++)
{
k=i;
for(j=i+1;j<n;j++)
{
if (sum[j]>sum[k])
k=j;
}
if(i!=k)
{
t=stu[i],h=sum[i];
stu[i]=stu[k],sum[i]=sum[k];
stu[k]=t,sum[k]=h;
}
}
for(i=0;i<n;i++)
printf("ID:%10ld,Name:%s,Score:%d\n",stu[i].studentID,stu[i].studentName,sum[i]);
}
void Datasort_3 (STU stu[],int n,int m) //5.按每个学生的总分由低到高排出名次表
{
int i,j,k,h,sum[N];
STU t;
for(i=0;i<n;i++)
{
sum[i]=0;
for(j=0;j<m;j++)
{
sum[i]=sum[i]+stu[i].score[j];
}
}
for(i=0;i<n;i++)
{
k=i;
for(j=i+1;j<n;j++)
{
if (sum[j]<sum[k])
k=j;
}
if(i!=k)
{
t=stu[i],h=sum[i];
stu[i]=stu[k],sum[i]=sum[k];
stu[k]=t,sum[k]=h;
}
}
for(i=0;i<n;i++)
printf("ID:%10ld,Name:%s,score:%d\n",stu[i].studentID,stu[i].studentName,sum[i]);
}
void Datasort_4 (STU stu[],int n,int m) //6.按学号由小到大排出名次表
{
int i,j,k;
STU t;
for(i=0;i<n;i++)
{
k=i;
for(j=i+1;j<n;j++)
{
if (stu[j].studentID<stu[k].studentID)
k=j;
}
if(i!=k)
t=stu[k],stu[k]=stu[i],stu[i]=t;
}
for(i=0;i<n;i++)
{
printf("ID:%10ld,Name:%s\n",stu[i].studentID,stu[i].studentName);
for(j=0;j<m;j++)
printf("Project %d Score:%d\n",j+1,stu[i].score[j]);
}
}
数据分析函数：
void Statistis (STU stu[],int n,int m) //10.
{
int i,j,count_1,count_2,count_3,count_4,count_5;
for(j=0;j<m;j++)
{
count_1=0,count_2=0,count_3=0,count_4=0,count_5=0;
for(i=0;i<n;i++)
{
if(stu[i].score[j]>=90)
count_1++;
else if(stu[i].score[j]>=80)
count_2++;
else if(stu[i].score[j]>=70)
count_3++;
else if(stu[i].score[j]>=60)
count_4++;
else
count_5++;
}
printf("project %d\n",j+1);
printf("优秀:%d\t优秀率:%f%\n",count_1,(float)count_1/n);
printf("良好:%d\t良好率:%f%\n",count_2,(float)count_2/n);
printf("中等:%d\t中等率:%f\n",count_3,(float)count_3/n);
printf("及格:%d\t及格率:%f\n",count_4,(float)count_4/n);
printf("不及格:%d\t不及格率:%f\n",count_5,(float)count_5/n);
}
}
数据界面打印函数：
void List (STU stu[],int n,int m) //11.
{
int i,j,sum[N];
double ave[N];
for(i=0;i<n;i++)
{
sum[i]=0;
for(j=0;j<m;j++)
{
sum[i]=sum[i]+stu[i].score[j];
}
ave[i]=(double)sum[i]/m;
}
for(i=0;i<n;i++)
{
printf("ID:%10ld,Name:%s\n",stu[i].studentID,stu[i].studentName);
for(j=0;j<m;j++)
{
printf("Score %d :%d\n",j+1,stu[i].score[j]);
}
printf("Allscore=%d\n平均分%f\n",sum[i],ave[i]);
}
}
文件处理函数：
void WritetoFile(STU stu[],int n,int m) //将每个学生的记录信息写入文件
{
Tota(stu,n,m);
Datasort_2 (stu,n,m);
FILE *fp;
if((fp=fopen("student.txt","w"))==NULL)
{
printf("Failure to open student.txt!\n");
exit(0);
}
fwrite(stu,sizeof(STU),n,fp);
fclose(fp);
}
int ReadfromFile(STU stu[],int n,int m)//从文件中读出每个学生的记录信息并显示
{
FILE *fp;
int i;
if((fp=fopen("student.txt","r"))==NULL)
{
printf("Failure to open student.txt!\n");
exit(0);
}
for(i=0;!feof(fp);i++)
{
fread(&stu[i],sizeof(STU),1,fp);
}
fclose(fp);
printf("Total student is %d.\n",i-1);
n=i-1;
List(stu,n,m); //输出从文件中读出的信息到屏幕上
return i-1;
}
