有一个小小的问题。希望大神搭把手~~~

#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#include<conio.h>
#define ArraySize 5
struct grade{
    int data;
    struct grade *lch;
    struct grade *rch;
};
struct PLAYER{
    int num;
    char name[20];
    double ave;
    struct grade *score;
};
struct grade *ADD_SCORE_TO_PLAYER(struct grade *rt,int data){
    int FLAG=0;
    struct grade *p,*t;
    p=(struct grade *)malloc(sizeof(struct grade));
    p->data=data;
    p->lch=p->rch=NULL;
    if(rt==NULL)
        rt=p;
    else{
        t=rt;
        while(!FLAG)
            if(t->data>data){if(t->lch==NULL){t->lch=p;FLAG=1;}else t=t->lch;}
            else{if(t->rch==NULL){t->rch=p;FLAG=1;}else t=t->rch;}
    }
    return rt;
}
void GET_SUM(struct grade *sc,int &sum){
    if(sc){
        GET_SUM(sc->lch,sum);
        sum+=sc->data;
         printf("%d\t",sc->data);
        GET_SUM(sc->rch,sum);
    }
}
void SORT(struct PLAYER py[],int n){
    for(int i=0;i<n-1;i++){
        for(int j=n-2;j>=i;j--)
            if(py[j].ave<py[j+1].ave){
                double temp=py[j].ave;
                py[j].ave=py[j+1].ave;
                py[j+1].ave=temp;
            }
    }
}
main()
{
    int i,j,n=10,sc,sum;
    struct PLAYER Array[ArraySize];
    for(i=0;i<ArraySize;i++){
        Array[i].score=(struct grade *)malloc(sizeof(struct grade));
        Array[i].score=NULL;
    }
    for(i=0;i<ArraySize;i++){
        printf("ADD name TO PLAYER %d:\n",i+1);
//        scanf("%s",Array[i].name);  
        Array[i].num=i+1;
        Array[i].ave=0;
        printf("ADD scores TO PLAYER %d:\n",i+1);
        for(j=0;j<n;j++){
            printf("ADD score[%d]\t",j+1);
//            scanf("%d",&sc);
            sc=i*10+j+5;
            Array[i].score=ADD_SCORE_TO_PLAYER(Array[i].score,sc);
        }
    }
    for(i=0;i<ArraySize;i++){
        sum=0;
         GET_SUM(Array[i].score,sum);
        struct grade *s=Array[i].score;
        if(s->lch){
            while(s->lch)s=s->lch;
            sum-=s->data;
        }
        else sum-=s->data;
        s=Array[i].score;
        if(s->rch){
            while(s->rch)s=s->rch;
            sum-=s->data;
        }
        else sum-=s->data;
        Array[i].ave=1.0*sum/8;
    }
    SORT(Array,ArraySize);
    printf("RESULTS:\n");
    for(i=0;i<3;i++){
//        printf("PLAYER%d:%s",i+1\t,Array[i].name);
        printf("PLAYER%d:%.2lf\n",i+1,Array[i].ave);
    }
    getch();
}