程序代码：

#include <stdio.h>
#define N 5
struct student
{
    int num;
    char name[20];
    char sex;
    int score;
};
int main(void)
{
    struct student stu[N];
    int i, Count_m = 0, Count_f = 0;
    for(i=0; i<N; ++i)
    {
        printf("Information No.%d\n", i+1);
        printf("Enter Num&Name:\n");
        scanf("%d%s", &stu[i].num, &stu[i].name);    /*输入学号和姓名*/
        printf("Enter sex&score:\n");
        scanf("%d%c", &stu[i].score, &stu[i].sex);    /*输入成绩和性别*/
        getchar();
    }
     for(i=0; i<N; ++i)
     {
         if(stu[i].sex == 'M'||stu[i].sex == 'm')    /*计算男生和女生的人数*/
             Count_m++;
         else
             Count_f++;
         if(stu[i].score > 85)                        /*分数大于85，输出名字和分数*/
         {
             printf("Name is %s\nScore is %d\n", stu[i].name, stu[i].score);
         }
     }
    printf("boys = %d, girls = %d\n", Count_m, Count_f);
    return 0;
}