typedef?struct
{
char?name[10];
char?birth[11];
double?chinese;
double?english;
double?math;
double?ave;
}student;
void?input(student?*p,int?n)
{
int?i;
for(i=0;i<n;i++)
{
printf("請輸入第%d位學生信息：\n",i+1);
printf("姓名：");
scanf("%s",(p+i)->name);
printf("生日(格式：2000-1-1)：");
scanf("%s",(p+i)->birth);
printf("語文成績：");
scanf("%lf",&(p+i)->chinese);
printf("數學成績：");
scanf("%lf",&(p+i)->math);
printf("英語成績：");
scanf("%lf",&(p+i)->english);
(p+i)->ave=((p+i)->chinese+(p+i)->math+(p+i)->english)/3;
}
printf("輸入完成！\n\n");
}
void?output(student?*p,int?n)
{
int?i;
printf("%10s%11s%9s%9s%9s%8s\n","姓名","生日","語文成績","數學成績","英語成績","平均分");
for(i=0;i<n;i++)
{
printf("%10s",(p+i)->name);
printf("%11s",(p+i)->birth);
printf("%9.0f",(p+i)->chinese);
printf("%9.0f",(p+i)->math);
printf("%9.0f",(p+i)->english);
printf("%8.2f\n",(p+i)->ave);
}
printf("輸出完成！\n\n");
}
void?sort(student?*p,int?n)
{
int?i,j;
student?t;
for(i=1;i<n;i++)
{
for(j=1;j<=n-i;j++)
{
if((*(p+i)).ave>(*(p+i-1)).ave)
{
t=*(p+i);
*(p+i)=*(p+i-1);
*(p+i-1)=t;
}
}
}
printf("--------------排序完成！\n\n");
}
int?main()
{
int?n,i;
student?stu[100];
printf("請輸入人數：");
scanf("%d",&n);
input(stu,n);
sort(stu,n);
output(stu,n);
return?0;
}
以前寫過類似的題目，妳可以修改修改，就差不多是妳題目要求了。