#include?
#include
#include
void?Add（int?grade[]int?n）;
void?Delete（int?grade[]int?n）;
void?List（int?grade[]int?n）;
void?Min（int?grade[]int?n）;
void?Max（int?grade[]int?n）;
double?Average（int?grade[]int?n）;
void?Standard（int?grade[]int?n）;
int?Exit（int?key）;

int?main（）
{
????char?operation;
????int?grade[1000]={0}key=1;
????while（key）
????{
????????std::cin>>operation;
????????if（operation>=‘a‘&&operation<=‘z‘）
????????{
????????????operation-=32;
????????}
????????switch（operation）
????????{
????????????case?‘A‘:Add（grade1000）;break;
????????????case?‘D‘:Delete（grade1000）;break;
????????????case?‘L‘:List（grade1000）;break;
????????????case?‘M‘:Min（grade1000）;break;
????????????case?‘P‘:Max（grade1000）;break;
????????????ca