STUDENT

#include <stdio.h>
#define STUDENT 20
#define SCORE_MIN 0
#define SCORE_MAX 100

void inputscore(int score[STUDENT], int i);
int scoremax(int score[STUDENT], int *max, int j);
int scoremin(int score[STUDENT], int *min, int k);
float scoreavg(int score[STUDENT], float *avg, float scoresum, int l);
int outputscore(int score[STUDENT], int max, int min, float avg);

void main()
{
        int score[STUDENT];
        int max=0, min=0;
        float avg=0;
        float scoresum=0;
        int i=0, j=0, k=0, l=0;

        inputscore(score, i);
        scoremax(score, &max, j);
        scoremin(score, &min, k);
                scoreavg(score, &avg, scoresum, l);
        outputscore(score, max, min, avg);
}

void inputscore(int score[STUDENT], int i)
{
        int tmp, fail=0;

        for(i=0; i<STUDENT; i++)
        {
                printf("input score : ");
                scanf("%d", &tmp);

                                if(tmp>SCORE_MAX || tmp<SCORE_MIN)
                                        fail = 1;

                                while(fail == 1)
                                {
                                        printf("wrong input! score must be 0~100.\ninput score : ");
                                        scanf("%d", &tmp);
                                       
                                        if( (tmp<=SCORE_MAX) && (tmp>=SCORE_MIN) )
                                                fail = 0;
                                }

                                score[i] = tmp;
        }
}

int scoremax(int score[STUDENT], int *max, int j)
{
        *max = score[0];

        for(j=0; j<STUDENT; j++)
        {
                if(score[j]>*max)
                        *max = score[j];
        }

        return *max;
}

int scoremin(int score[STUDENT], int *min, int k)
{
        *min = score[0];

        for(k=0; k<STUDENT; k++)
        {
                if(score[k]<*min)
                        *min = score[k];
        }

        return *min;
}

float scoreavg(int score[STUDENT], float *avg, float scoresum, int l)
{
        for(l=0; l<STUDENT; l++)
                scoresum += score[l];

        *avg = (float)(scoresum/STUDENT);

        return *avg;
}

int outputscore(int score[STUDENT], int max, int min, float avg)
{
        int m;

        for(m=0; m<STUDENT; m++)
                printf("%d ", score[m]);
        printf("\n");

        printf("max : %d\n", max);
        printf("min : %d\n", min);
        printf("avg : %.2f\n", avg);

        return 0;
}