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typedef struct student /*定義儲存學(xué)生成績信息的數(shù)組*/
{
char *name;
int chinese;
int maths;
int phy;
int total;
}ST;

main()
{
ST a[N]; /*存儲N個學(xué)生信息的數(shù)組*/
FILE *fp;
void (*process[3])(ST *)={Output,Bubble,Find}; /*實現(xiàn)相關(guān)功能的三個函數(shù)*/
int choice,i=0;
Show();
printf("\nChoose:\n?");
scanf("%d",&choice);
while(choice>=0&&choice<=2)
   {
   fp=fopen("aa.dat","rb");
   for(i=0;i<N;i++)
      fread(&a[i],sizeof(ST),1,fp); /*把文件中儲存的信息逐個讀到數(shù)組中去*/
   fclose(fp);
   (*process[choice])(a); /*前面提到的指向函數(shù)的指針，選擇操作*/
   printf("\n");
   Show();
   printf("\n?");
   scanf("%d",&choice);
   }
}

void Show()
{
printf("\n****Choices:****\n0.Display the data form\n1.Bubble it according to the total score\n2.Search\n3.Quit!\n");
}

void Output(ST *a) /*將文件中存儲的信息逐個輸出*/
{
int i,t=0;
printf("Name Chinese Maths Physics Total\n");
for(i=0;i<N;i++)
   {
   t=a[i].chinese+a[i].maths+a[i].phy;
   a[i].total=t;
   printf("%4s%8d%8d%8d%8d\n",a[i].name,a[i].chinese,a[i].maths,a[i].phy,a[i].total);
   }
}

void Bubble(ST *a) /*對數(shù)組進行排序，并輸出結(jié)果*/
{
int i,pass;
ST m;
for(pass=0;pass<N-1;pass++)
   for(i=0;i<N-1;i++)
      if(a[i].total<a[i+1].total)
         {
         m=a[i]; /*結(jié)構(gòu)互換*/
         a[i]=a[i+1];
         a[i+1]=m;
         }
Output(a);
}

void Find(ST *a)
{
int i,t=1;
char m[20];
printf("\nEnter the name you want:");
scanf("%s",m);
for(i=0;i<N;i++)
   if(!strcmp(m,a[i].name)) /*根據(jù)姓名匹配情況輸出查找結(jié)果*/
   {
   printf("\nThe result is:\n%s, Chinese:%d, Maths:%d,     Physics:%d,Total:%d\n",m,a[i].chinese,a[i].maths,a[i].phy,a[i].total);
   t=0;
   }
if(t)
   printf("\nThe name is not in the list!\n");
}