C语言上机实习

#include"math.h"

#include "Conio.h"

# include"stdio.h"

#define M 38

struct student

{

long num;

char name[20];

float score[5];

float aver;

int row;

int m1;

int m2;

}stu[M];

struct chengji

{int num;

char name[20];

float fen;

}course[5];

struct

{int P;

int Q;

int R;

int S;

int L;}count[5];

/*struct

{char a[20];

char b[20];

char c[20];

char d[20];

char e[20];

}bh[5];*/

main() /*主菜单*/

{ char ch1;

do{

printf("\n\n\n\n\n\n\n\n\n");

printf(" ************** C 语程序设计上机实习****************\n");

printf(" ---------------------------------------------------\n\n");

printf(" 1 学生成绩管理\n\n");

printf(" 2 解线性方程组\n\n");

printf(" 3 动画\n\n");

printf(" 4 退出\n\n");

printf(" 输入选择序号\n");

while( (ch1=getchar(), ch1!='1'&& ch1!='2' &&ch1!='3'&&ch1!='4' )) ;

switch(ch1)

{case '1' : section1(); break;

case '2' : section2(); break;

case '3' : section3(); break;

case '4' : exit(0); }

}while(1);

}

section1() /*第1个2级菜单*/

{char ch21;

do{ printf("\n\n\n\n\n\n\n\n\n\n");

printf(" ************学生成绩管理系统****************\n");

printf(" ---------------------------------------------------\n\n");

printf(" 1. 读入原始数据并显示 2. 计算平均分及名次\n\n");

printf(" 3. 计算分数段人数 4. 输出课程平均分\n\n");

printf(" 5. 统计不及格情况 6. 输出优秀学生\n\n");

printf(" 7. 作分布图8. 返回上级菜单\n\n");

printf(" 输入选择序号\n");

while((ch21=getchar(),ch21!='1'&&ch21!='2'&&ch21!='3'&&ch21!='4'&&ch21!='5'&&ch21!='6' &&ch21!='7'&&ch21!='8')) ;

switch(ch21)

{case '1' : function1_1(); break;

case '2' : function1_2(); break;

case '3' : function1_3(); break;

case '4' : function1_4(); break;

case '5' : function1_5(); break;

case '6' : function1_6(); break;

case '7' : function1_7(); break;

case '8' : return(0);}

}while(1);

}

section2() /*第2个2级菜单*/

{ char ch22;

do{ printf("\n\n\n\n\n\n\n\n\n\n");

printf(" ***************** 解线性方程组****************\n");

printf(" -------------------------------------------------\n");

printf(" 1. 解方程组\n\n");

printf(" 2. 返回上级菜单\n\n");

printf(" 输入选择序号\n");

while( (ch22=getchar(), ch22!='1'&& ch22!='2')) ;

switch(ch22)

{case '1' : function2_1(); break;

case '2' : return(0);}

}while(1);

}

section3() /*第3个2级菜单*/

{ char ch23;

do{ printf("\n\n\n\n\n\n\n\n\n\n");

printf(" ***************** 作动画****************\n");

printf(" -------------------------------------------------\n");

printf(" 1. 作动画\n\n");

printf(" 2. 返回上级菜单\n\n");

printf(" 输入选择序号\n");

while (ch23=getchar(), ch23!='1'&& ch23!='2') ;

switch(ch23)

{case '1' : function3_1(); break;

case '2' : return(0);}

}while(1);

}

function1_1()

{

int i,j;

FILE *fp,*fp1;

char str[100];

if((fp=fopen("D:\\成绩表.txt","r"))==NULL)

{printf("cannot open this file\n");

exit(0);

}

if((fp1=fopen("D:\\学生成绩表.txt","w"))==NULL)

{printf("cannot open this file\n");

exit(0);

}

fgets(str,100,fp);

for(i=0;i

{fscanf(fp,"%ld%s",&stu[i].num,stu[i].name);

for(j=0;j<5;j++)

fscanf(fp,"%f",&stu[i].score[j]);

}

printf("学号姓名英语数学大学物理机械制图C程序设计");