第2周项目2--程序的多文件组织

<span style="font-family:Arial;BACKGROUND-COLOR: #ffffff"></span><pre class="cpp" name="code">//计算机与控制工程学院
//作者：孙潇
//时间：9月11号
//问题描述：用程序实现多个文件形式组织并运行
//输入描述：无
//输出描述：输出学生信息
#include <stdio.h>
#define MaxStud 50      //学生人数最多为50
#define MaxCour 300     //学生成绩记录数最多为50*6
struct stud1
{
int no;         //学号
char name[10];  //姓名
int bno;        //班号
};
struct stud2
{
int no;         //学号
int cno;        //课程编号
int deg;        //分数
};
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) ;
cpp文件中定义主函数main

#include"touwenjian.cpp"
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;
}

#include"touwenjian.h"
double studavg(struct stud2 s2[],int m,int i)   //求学号为i的学生的平均分
{
int j,n=0;              //n为学号为i的学生选学课程数
double sum=0;           //学号为i的学生总分
for (j=0; j<m; j++)
if (s2[j].no==i)    //学号为i时统计
{
n++;
sum+=s2[j].deg;
}
return(sum/n);
}
double couravg(struct stud2 s2[],int m,int i)   //求编号为i的课程的平均分
{
int j,n=0;              //n为编号为i的课程选修人数
double sum=0;           //编号为i的课程总分
for (j=0; j<m; j++)
{
if (s2[j].cno==i)   //课程编号为i时统计
{
n++;
sum+=s2[j].deg;
}
}
return(sum/n);
}
void allavg(struct stud1 s1[],int n,struct stud2 s2[],int m)    //求学生平均分和课程平均分
{
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));
}

<span style="font-family:Arial;BACKGROUND-COLOR: #ffffff"><span style="font-family:Courier New;BACKGROUND-COLOR: #f0f0f0">运行结果：</span></span>

<span style="font-family:Arial;BACKGROUND-COLOR: #ffffff"><img src="https://img-blog.csdn.net/20150911093227500?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQv/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center" alt="" /></span>

<span style="font-family:Arial;BACKGROUND-COLOR: #ffffff">知识点总结：</span>

<span style="font-family:Arial;BACKGROUND-COLOR: #ffffff">.h头文件：定义数据类型，生命自定义函数</span>

<span style="font-family:Arial;BACKGROUND-COLOR: #ffffff">.cpp文件：用于实现文件中生命的自定义函数</span>

<span style="font-family:Arial;BACKGROUND-COLOR: #ffffff">.cpp文件：定义main（）主函数，调用相关函数，实现问题求解目标</span>

<span style="font-family:Arial;BACKGROUND-COLOR: #ffffff"></span> 

<span style="font-family:Arial;BACKGROUND-COLOR: #ffffff">学习心得：</span>

<span style="font-family:Arial;BACKGROUND-COLOR: #ffffff">实现分割函数的时候，思路并不清晰，不能熟练的进行文件新建和调用。</span>

<span style="font-family:Arial;BACKGROUND-COLOR: #ffffff">但是分割文件会将程序模块化，训练编程思维，简化编程步骤。</span>