第2周项目2 程序的多文件组织

tou.h

#include <stdio.h>   
#define MaxStud 50      
#define MaxCour 300          
double studavg(struct stud2 s2[],int m,int i);         
double couravg(struct stud2 s2[],int m,int i);         
void allavg(struct stud1 s1[],int n,struct stud2 s2[],int m);       
struct stud1  
{  
    int no;           
    char name[10];     
    int bno;          
};  
struct stud2  
{  
    int no;          
    int cno;           
    int deg;           
}; 

main.cpp

#include"tou.h"   
int main()  
{  
    int n=7;        //学生记录人数   
    int m=21;       //学生成绩记录数   
    struct stud1 s1[MaxStud]=  
    {  
       {1,"张斌",9901},  
        {8,"刘丽",9902},  
        {34,"李英",9901},  
        {20,"陈华",9902},  
        {12,"王奇",9901},  
        {26,"董强",9902},  
        {5,"王萍",9901}  
    };  
    struct stud2 s2[MaxCour]=   //规定课程的编号从1到6,同一学生成绩记录连续存放   
    {  
        {1,1,67},  
        {1,2,98},  
        {1,4,65},  
        {8,1,98},  
        {8,3,90},  
        {8,6,67},  
        {34,2,56},  
        {34,4,65},  
        {34,6,77},  
        {20,1,68},  
        {20,2,92},  
        {20,3,64},  
        {12,4,76},  
        {12,5,75},  
        {12,6,78},  
        {26,1,67},  
        {26,5,78},  
        {26,6,62},  
        {5,1,94},  
        {5,2,92},  
{5,6,89}  
    };  
    allavg(s1,n,s2,m);  
    return 0;  
} 

hs.cpp

#include"tou.h"   
double studavg(struct stud2 s2[],int m,int i)      
{  
    int j,n=0;                 
    double sum=0;              
    for (j=0; j<m; j++)  
        if (s2[j].no==i)      
        {  
           n++;  
            sum+=s2[j].deg;  
        }  
    return(sum/n);  
}  
double couravg(struct stud2 s2[],int m,int i)      
{  
    int j,n=0;                
    double sum=0;             
    for (j=0; j<m; j++)  
    {  
        if (s2[j].cno==i)      
        {  
            n++;  
            sum+=s2[j].deg;  
        }  
    }  
   return(sum/n);  
}  
void allavg(struct stud1 s1[],int n,struct stud2 s2[],int m)     
{  
    int i,j;  
    printf("学生平均分:\n");  
    printf("  学号     姓名 平均分\n");  
    i=0;  
    while (i<n)  
    {  
        j=s1[i].no;  
        printf("%4d %10s %g\n",s1[i].no,s1[i].name,studavg(s2,m,j));  
        i++;  
    }  
    printf("课程平均分:\n");  
    for (i=1; i<=6; i++)  
        printf(" 课程%d:%g\n",i,couravg(s2,m,i));  
}