求c语言编程，，帮帮忙，，急急，，急急！！！！

建立下列学生编号，姓名及数学，语文，英语3门课程成绩的输入数据的文本文件inData.txt(不含标题栏)
从inData.txt把数据读入结构体数组stu中．计算每个学生的平均成绩 ．将结果以下列形式输出到文本文件outData.txt中：
Num name math chinese english Average
050001 zhang 90 89 91 90
050002 Li 91 78 67 79
050003 Wang 67 60 78 68
050004 Zhu 100 99 94 98
050005 Tang 84 67 59 70

我做过一个类似的 只是数据结构不一样（但也是学生的）
你看懂了这个 你就自己会编了
#include<stdio.h>
#include<stdlib.h>
#include<string.h>
int M=3;//用户数
int N=7;//学生数

struct birthday
{
int year;
int month;
int day;
};
struct score
{
int English;
int Math;
int Clanguage;
};
struct student//学生
{
char academy[10];
char remove[10];
int number;
char name[10];
char sex;
char adress[20];
struct birthday birday;
struct score grade;
}stu[50];

struct student p[50];

struct user//用户
{
char name[10];
char password[10];
int GF;
}use[10];

void bbb();/*初始化用户信息存在myfile1.txt*/
void aaa();/*初始化学生信息myfile.txt*/
void ccc();/*初始化学生与用户的个数*/
void startget();/*将文件的数据读入到数组中use[10]，p[50]*/

void main()
{
aaa();
bbb();
ccc();
printf("安装完成！\n");
printf("按回车键结束！\n");
getchar();
startget();
printf("初始化话成功！\n");
printf("按回车键结束！\n");
getchar();
/*****下面你就可以用数组use[10]，p[50]了，数据初始化了***********/
//////////////////////////////////////////////////////////////////
}
void aaa()
{
struct student stu[50]={{"计算机","软件041",1,"张东",'m',"北京",{87,8,7},{80,90,85}},
{"计算机","软件041",2,"于南",'m',"上海",{86,11,7},{98,80,95}},
{"计算机","软件041",3,"周西",'f',"杭州",{87,4,30},{45,78,79}},
{"计算机","软件042",4,"王北",'m',"广东",{86,5,30},{76,71,74}},
{"计算机","软件042",5,"李中",'m',"南京",{85,3,30},{60,69,79}},
{"人文","法律041",6,"顾君",'f',"海南",{84,9,21},{85,83,54}},
{"水院","土木043",7,"陈海",'m',"天津",{88,8,5},{97,91,86}}};
FILE *pf;
if((pf=fopen("d:\\myfile.txt","w"))==0)//建立文件
{
printf("Can'open it");
exit(0);
}
for(int i=0;i<N;i++) //在文件写入数据
if(fwrite(stu+i,sizeof(struct student),1,pf)!=1)
printf("File write error\n");
fclose(pf);
;}

void bbb()
{
struct user use[10]={{"yudonghao","2",1},{"masong","1",-1},{"yudong","3",-1},};
FILE *pf;
int i;
if((pf=fopen("d:\\myfile1.txt","w"))==NULL)//建立文件
{
printf("Can't open it");
exit(0);
}
for(i=0;i<M;i++) //在文件写入数据
if(fwrite(use+i,sizeof(struct user),1,pf)!=1)
printf("File write error\n");
fclose(pf);
}
void ccc()
{
int b[2];
b[0]=N;
b[1]=M;
FILE *pf;
if((pf=fopen("d:\\myfile2.txt","w"))==NULL)//建立文件
{
printf("Can't open it");
exit(0);
}
if(fwrite(b,sizeof(int),2,pf)==0)
printf("File write error\n");
fclose(pf);
}

void startget()
{
int b[2];
FILE *pf,*pf1,*pf2;
if((pf=fopen("D:\\myfile2.txt","r"))==NULL)//以读形式打开文件
{
printf("Can'open it");
exit(0);
}
fread(b,sizeof(int),2,pf);
fclose(pf);

N=b[0],M=b[1];

if((pf1=fopen("D:\\myfile.txt","r"))==NULL)//以读形式打开文件
{
printf("Can'open it");
exit(0);
}
for(int i=0;i<N;i++) //将文件内容给p[]初始化
fread(p+i,sizeof(struct student),1,pf1);
fclose(pf1);

if((pf2=fopen("D:\\myfile1.txt","r"))==NULL)//以读形式打开文件
{
printf("Can'open it");
exit(0);
}
fread(use,sizeof(struct user),M,pf2);
fclose(pf2);
}

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