#include<stdio.h>
void average(float(*p)[6])
{
    int i, j;
    float sum = 0, aver;
    for (j = 1; j < 6; j++)
    {
        for (i = 0; i < 4; i++)
            sum = sum + *(*(p + i) + j);
        aver = sum / 4; break;
    }
    printf("第一门课的平均分是\naver=%5.2f\n", aver);
}

void search(float(*p)[6])
{
    int i, j, k;
    float sum, aver;
    for (i = 0; i < 4; i++)
    {
        k = 0;
        sum = 0;
        aver = 0;
        for (j = 1; j < 6; j++)
            if (*(*(p + i) + j) < 60.0)
                k++;
        if (k >= 2)
        {
            printf("两门以上不及格的学生的学号及全部成绩是:\n");
            for (j = 0; j < 6; j++)
                printf("%11.2f", *(*(p + i) + j));
            printf("\n");
            for (j = 1; j < 6; j++)
                sum = sum + *(*(p + i) + j);
            aver = sum / 5;
            printf("该生的平均分是\naver=%5.2f\n", aver);
        }
    }
}

int main()
{
    void average(float(*p)[6]);
    void search(float(*p)[6]);
    float a[4][6] = { {101,34,56,88,99,89},{102,27,88,99,67,78},{103,99,90,87,86,89},{104,78,89,99,56,77} };
    average(a);
    search(a);
    return 0;
}

做的好烂，不过功能都实现了

#include<stdio.h>
void average(float(*p)[6])
{
    int i, j;
    float sum = 0, aver;
    for (j = 1; j < 6; j++)
    {
        for (i = 0; i < 4; i++)
            sum = sum + *(*(p + i) + j);
        aver = sum / 4; break;
    }
    printf("第一门课的平均分是\naver=%5.2f\n", aver);
}

void search(float(*p)[6])
{
    int i, j, k;
    float sum, aver;
    for (i = 0; i < 4; i++)
    {
        k = 0;
        sum = 0;
        aver = 0;
        for (j = 1; j < 6; j++)
            if (*(*(p + i) + j) < 60.0)
                k++;
        if (k >= 2)
        {
            printf("两门以上不及格的学生的学号及全部成绩是:\n");
            for (j = 0; j < 6; j++)
                printf("%11.2f", *(*(p + i) + j));
            printf("\n");
            for (j = 1; j < 6; j++)
                sum = sum + *(*(p + i) + j);
            aver = sum / 5;
            printf("该生的平均分是\naver=%5.2f\n", aver);
        }
    }
}

void find(float(*p)[6])
{
    int i, j;
    float sum, aver, min = 100;
    for (i = 0; i < 4; i++)
    {
        sum = 0;
        aver = 0;
        for (j = 1; j < 6; j++)
        {
            sum = sum + *(*(p + i) + j);
            if (min > *(*(p + i) + j))
                min = *(*(p + i) + j);
        }
        aver = sum / 5;
        if (aver > 90 || min > 85)
        {
            printf("平均成绩在90分以上或全部成绩在85分以上的学生及成绩是\n");
            for (j = 0; j < 6; j++)
                printf("%11.2f", *(*(p + i) + j));
            printf("\n");
        }
    }
}

int main()
{
    void average(float(*p)[6]);
    void search(float(*p)[6]);
    void find(float(*p)[6]);
    float a[4][6] = { {101,34,56,88,99,89},{102,27,88,99,67,78},{103,99,90,87,86,89},{104,78,89,99,56,77} };
    average(a);
    search(a);
    find(a);
    return 0;
}

加油~慢慢优化代码~优化代码的能力是编程能力体现之一~

#include<stdio.h>

void _list(float *p, int m, int n)
{
    int i, j;
    printf("分数表\t 学号\t成绩1\t成绩2\t成绩3\t成绩4\t成绩5\n");
    for (i=0; i<m; i++)
    {
        printf("\t%5.0f", *(p+i*n));
        for (j=1; j<n; j++)
            printf("\t%5.2f", *(p+i*n+j));
         printf("\n");   
    }
}

float _av(float *p, int m, int n, int k)
{
    int i;
    float sum=0;
    for (i=0; i<m; i++)
        sum += *(p+i*n+k);
    return sum/m;
}

void _avs(float *p, int m, int n)
{
    int i;
    printf("\n平均分\t");
    for (i=1; i<n; i++)
        printf("\t%5.2f", _av(p, m, n, i));
    printf("\n");
}

void search(float *p, int m, int n)
{
    int i, j, k;
    float sum;
    printf("\n两门以上不及格的学生的学号及全部成绩是:\n");
    for (i=0; i<4; i++)
    {
        k = 0;
        sum = 0;
        for (j=1; j<6; j++)
            if (*(p+i*n+j) < 60.0)
                k++;
        if (k > 1)
        {
            printf("\t%5.0f", *(p+i*n));
            for (j=1; j<6; j++)
            {
                sum += *(p+i*n+j);
                printf("\t%5.2f", *(p+i*n+j));
            }
            printf("\t平均分aver=%5.2f\n", sum/(n-1));
        }
    }
}

main()
{
    float a[4][6] = { {101,34,56,88,99,89},{102,27,88,99,67,78},{103,99,90,87,86,89},{104,78,89,99,56,77} };
    _list((float *)a, 4, 6);   
    _avs((float *)a, 4, 6);   
    search((float *)a, 4, 6);
}