#include <stdio.h>

#include <stdlib.h>

#define N 10

int cmp(const void *a,const void *b){

    return *(int*)b - *(int*)a;

}

int Sum(int score[]){

    int s = 0,i;

    for(i = 0 ; i < N ; i++)

        s += score[i];

    return s;

}

int Max(int score[]){

    return score[0];

}

int Min(int score[]){

    return score[N-1];

}

double Avg(int s){

    return (s + 0.0) / N;

}

int main()

{

    int score[N]={67,98,75,63,82,79,81,91,66,84};

    int i,sum;

    sum = Sum(score);

    qsort(score,N,sizeof(int),cmp);//sort it

    printf("Total score : %d\n",sum);

    printf("Max score : %d\n",Max(score));

    printf("Min Score : %d\n",Min(score));

    printf("Average score : %f\n",Avg(sum));

    printf("\n成绩排序:\n");

    for(i = 0 ; i < N ; i++)

    {

        printf("Rank %d's score : %d\n",i+1,score[i]);

    }

    return 0;

}

这样呀。