结构体指针和数组

typedef struct{
int num1;
int num2;
int num3;
char name[10];
int all;
}Student;

Student *ptr=(Student *)malloc(sizeof(Student)*num);

for (i=0;i<num;i++)
{
scanf("%d %d %d %s",&(ptr+i)->num1,&(ptr+i)->num2,&(ptr+i)->num3,(ptr+i)->name);
(ptr+i)->all=(ptr+i)->num1*(ptr+i)->num2*(ptr+i)->num3;
aver+=(ptr+i)->all;
}
aver/=num;
for (i=0;i<num;i++)
{
if ((ptr+i)->all > aver) strcpy(result[0],(ptr+i)->name);
if ((ptr+i)->all < aver) strcpy(result[1],(ptr+i)->name);
}