C语言-数组-读入学生信息统计各分数段人数并打印

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#include  <stdio.h>
#define ARR_SIZE 30
int NumScore(long num[], float score[]);
int getFailInfo(float score[], long num[], int n);
float getAver(float score[], int n);
int GetAboveAver(long num[], float score[], int n);
void GetSubsection(float score[], int n);

int main(void)
{
    int n,m,aboveAver;
    float score[ARR_SIZE];
    long num[ARR_SIZE];
    printf("Please enter num and score until score<0:n");
    n = NumScore(num, score);
    printf("Total students:%dn", n);
    printf("Fail:n");
    m = getFailInfo(score,num,n);
    printf("Fail students = %dn",m);
    aboveAver = GetAboveAver(num,score,n);
    printf("Above aver students = %dn",aboveAver);
    GetSubsection(score, n);
    return 0;
}

int NumScore(long num[], float score[])
{
    int i = 0,count = 0;
    for(i=0; i<ARR_SIZE; i++)
    {
        scanf("%ld %f", &num[i], &score[i]);
        count++;
        if(score[i] < 0)
            break;
    }
    return i;
}

int getFailInfo(float score[], long num[], int n)
{
    int i,count = 0;
    printf("number--scoren");
    for(i=0; i<n; i++)
    {
        if(score[i] < 60)
        {
            count++;
            printf("%ld------%.0fn",num[i],score[i]);
        }
    }
    return count;
}

float getAver(float score[], int n)
{
    int i;
    float sum = 0.0;
    for(i=0; i<n; i++)
    {
        sum += score[i];
    }
    return sum/n;
}

int GetAboveAver(long num[], float score[], int n)
{
    int count = 0;
    int i;
    float aver;
    aver = getAver(score,n);
    printf("aver = %fn",aver);
    printf("Above aver:n");
    printf("number--scoren");
    for(i=0; i<n; i++)
    {
        if(score[i] > aver)
        {
            printf("%ld------%.0fn",num[i],score[i]);
            count++;
        }
    }
    return count;
}

void GetSubsection(float score[], int n)
{
    int count1,count2,count3,count4,count5,count6;
    count1=count2=count3=count4=count5=count6=0;
    int i,stu[6] = {0,0,0,0,0,0,};
    for(i=0; i<n; i++)
    {
        if(score[i] < 60)
            count1++;
        else if(score[i] < 70)
            count2++;
        else if(score[i] < 80)
            count3++;
        else if(score[i] < 90)
            count4++;
        else if(score[i] < 100)
            count5++;
        else
            count6++;
    }
    printf("   <60  %d  %.2f%%n",count1,(float)count1/n*100);
    printf("60--69  %d  %.2f%%n",count2,(float)count2/n*100);
    printf("70--79  %d  %.2f%%n",count3,(float)count3/n*100);
    printf("80--89  %d  %.2f%%n",count4,(float)count4/n*100);
    printf("90--99  %d  %.2f%%n",count5,(float)count5/n*100);
    printf("   100  %d  %.2f%%n",count6,(float)count6/n*100);
}