#include<stdio.h>
#include<string.h>
    struct student        /*定义学生信息*/
    {char num;
     char name[20];
     char sex;
     char major;
     int chinese;
     int math;
     int english;
    };
    struct student str[30],*p;
void main()
{
    int com(struct student *score);
    int i;
    for(i=0;i<30;i++)        /*循环录入学生信息*/
    {scanf("%d\n",str[i].num);
     scanf("%s\n",str[i].name);
     scanf("%c\n",str[i].sex);
     scanf("%s\n",str[i].major);
     scanf("%d\n",str[i].chinese);
     scanf("%d\n",str[i].math);
     scanf("%d\n",str[i].english);
    }
    p=str;
    com(p);
}
    int com(int *score)
    {
        int a,b,c,d,e,i;
        a=b=c=d=e=0;
        for(i=0;i<30;i++)
        {switch(score[i]->chinese/10)
            case 0:
                case 1:
                    case 2:
                        case 3:
                            case 4:
                                case 5:e++;break;
                                    case 6:d++;break;
                                        case 7:c++;break;
                                            case 8:b++;break;
                                                case 9:
                                                    case 10:a++;break;
                                                        default :printf("error");
            printf("不及格：%d\n,及格：%d\n,中:%d\n,良:%d\n,优:%d\n",e,d,c,b,a);
        }



f:\新建文件夹\求和.cpp(35) : error C2227: left of '->chinese' must point to class/struct/union
f:\新建文件夹\求和.cpp(42) : error C2046: illegal case
f:\新建文件夹\求和.cpp(43) : error C2046: illegal case
f:\新建文件夹\求和.cpp(44) : error C2046: illegal case
f:\新建文件夹\求和.cpp(45) : error C2046: illegal case
f:\新建文件夹\求和.cpp(46) : error C2046: illegal case
f:\新建文件夹\求和.cpp(47) : error C2047: illegal default
f:\新建文件夹\求和.cpp(50) : fatal error C1004: unexpected end of file found    



那个switch的函数有点弄不来了。

scanf("%d\n",str[i].num);
     scanf("%s\n",str[i].name);
     scanf("%c\n",str[i].sex);
     scanf("%s\n",str[i].major);
     scanf("%d\n",str[i].chinese);
     scanf("%d\n",str[i].math);
     scanf("%d\n",str[i].english);
------
很明显的漏了&

不是这的问题。

switch后面的大括弧啊.......

scanf("%d\n",str[i].num);
     scanf("%s\n",str[i].name);
     scanf("%c\n",str[i].sex);
     scanf("%s\n",str[i].major);
     scanf("%d\n",str[i].chinese);
     scanf("%d\n",str[i].math);
     scanf("%d\n",str[i].english);
------
有一些要加上&，，，

switch后面的大括弧漏了

明显的问题不说了


明显是参数的问题有错

#include<stdio.h>
#include<string.h>

    struct student        /*定义学生信息*/
    {
     char num;
     char name[20];
     char sex;
     char major;
     int chinese;
     int math;
     int english;
    };
    struct student str[30];
//    struct studen *p;

    //void com(struct student *score);

void main()
{
   
  
    int i;
    for(i=0;i<3;i++)        /*循环录入学生信息*/
    {
     scanf("%d\n",&str[i].num);
     scanf("%s\n",&str[i].name);
     scanf("%c\n",&str[i].sex);
     scanf("%s\n",&str[i].major);
     scanf("%d\n",&str[i].chinese);
     scanf("%d\n",&str[i].math);
     scanf("%d\n",&str[i].english);
    }
 
       int a,b,c,d,e,j;
        a = 0;
        b = 0;
        c = 0;
        d = 0;
        e = 0;
        for(j=0;j<3;j++)
        {
            switch(str[i].chinese/ 10)
            {
            case 0:
                case 1:
                    case 2:
                        case 3:
                            case 4:
                                case 5:
                                    e++;
                                    break;
                                    case 6:
                                        d++;
                                        break;
                                        case 7:
                                            c++;
                                            break;
                                            case 8:
                                                b++;
                                                break;
                                                case 9:
                                                    case 10:
                                                        a++;
                                                        break;
                                                        default :
                                                            printf("error");
                                                            break;
            }
           
        }
         printf("不及格：%d\n,及格：%d\n,中:%d\n,良:%d\n,优:%d\n",e,d,c,b,a);
    }



----------
参数的问题 我也不会

这样行了

哎，没大牛了，那我这和小菜就客串下吧：
就像6楼说的，明显的错误比如少地址符，，参数类型不匹配，少大括号的就不说了还有个错误是传参；
   p=str;
    com(p);
楼主通过这两句话实现参数传递的，
struct student *p;p只是一个指向struct  student类型的指针。
而在这个参数用的时候

switch(score[i]->chinese/10)
确是当成了一个指针数组来用，肯定是不行的啊

struct student str[30],*p[];
.
.
.
for(i=0;i<30;i++)
    p[i]=&str[i];
    com(p[0]);
.
.
switch((score+i)->chinese/10)
.
或者
for(i=0;i<30;i++)
    p[i]=&str[i];
    com(p[30]);
。
。
。
switch(score[i]->chinese/10)
这样貌似应该能编译通过吧
当然，7楼兄弟的方法我感觉比较好

#include<stdio.h>
#include<string.h>

    struct student        /*定义学生信息*/
    {
     char num;
     char name[20];
     char sex;
     char major;
     int chinese;
     int math;
     int english;
    };
    struct student str[30];

    void com(struct student *score);

void main()
{
   
  
    int i;
    for(i=0;i<3;i++)        /*循环录入学生信息*/
    {
    printf("please input the num %d\n",i+1);
    printf("please input the name \n");
    printf("please input the sex\n");
    printf("please input the major\n");
    printf("please input the chinese score\n");
    printf("please input the math score\n");
    printf("please input the english score\n");
     scanf("%d\n",&str[i].num);
     scanf("%s\n",&str[i].name);
     scanf("%c\n",&str[i].sex);
     scanf("%s\n",&str[i].major);
     scanf("%d\n",&str[i].chinese);
     scanf("%d\n",&str[i].math);
     scanf("%d\n",&str[i].english);
    }

   
    com(str);
}
void com(struct student *score)
{
       int a,b,c,d,e,j;
        a = 0;
        b = 0;
        c = 0;
        d = 0;
        e = 0;
        for(j=0;j<3;j++)
        {
            switch(score[j].chinese/ 10)
            {
            case 0:
                case 1:
                    case 2:
                        case 3:
                            case 4:
                                case 5:
                                    e++;
                                    break;
                                    case 6:
                                        d++;
                                        break;
                                        case 7:
                                            c++;
                                            break;
                                            case 8:
                                                b++;
                                                break;
                                                case 9:
                                                    case 10:
                                                        a++;
                                                        break;
                                                        default :
                                                            printf("error");
                                                            break;
            }
           
        }
         printf("不及格：%d\n,及格：%d\n,中:%d\n,良:%d\n,优:%d\n",e,d,c,b,a);
    }



-----------
传参我也不会
这样可以通过了

有个问题 你为什么要用switch 来统计成绩的分布呢
用if else 不更好么

现在有个问题，每次你要输入八次才行。
建议别使用switch了