学生成绩管理系统-vs汇编

1、学习 好资料#include <stdio.h>#include <stdlib.h>#include <conio.h> #include <dos.h> #include <string.h> #define LEN sizeof ( struct student)#define FORMAT"%-8d%-15s%-12.1lf%-12.1lf%-12.1lf%-12.1lfn"#define DATA stui.num,,stui.elec,stui.expe,stui.requ,stui.

2、sum float Ielec,Iexpe,Irequ;float Felec,Fexpe,Frequ;struct student /* 定义学生成绩结构体 */int num; /* 学号 */char name15; /* 姓名 */ double elec; /* 选修课 */ double expe; /* 实验课 */ double requ; /* 必修课 */ double sum; /* 总分 */;struct student stu50; /* 定义结构体数组 */ void input(); /* 录入学生成绩信息 */ void show(); /* 显示学生信息 *

3、/ void sort(); /* 按总分排序 */ void del(); /* 删除学生成绩信息 */ void modify(); /* 修改学生成绩信息 */ void menu(); /* 主菜单 */ void insert(); /* 插入学生信息 */ void total(); /* 计算总人数 */ void search(); /* 查找学生信息 */ main()int n; menu(); scanf( "%d",&n); while (n) switch (n)case 1: input();break ;case 2: search()

4、;break ;case 3: del();break ;case 4: modify();break ;case 5: insert();break ;case 6: sort();break ;case 7: total();break ;default : break ;menu(); scanf( "%d",&n); void show() FILE *fp;int i,m=0;fp=fopen( "d:data.txt", "ab+" );while (!feof(fp)if (fread(&stum ,LE

5、N,1,fp)=1) m+;fclose(fp);printf( "number name elective experiment required sumtn" for (i=0;i<m;i+)printf(FORMAT,DATA); /* 将信息按指定格式打印 */void menu()system( "cls" );printf( "n" );printf( "n" );printf( "t|Student management system|n");printf("t|n

6、"printf("t|0. exit|n"printf("t|n"printf("t|1. input record|n"printf("t|n"printf("t|2. search record|n"printf("t|n"printf("t|3. delete record|n"printf("t|n"printf("t|4. modify record|n"printf("t|n"

7、;printf("t|5. insert record|n"printf("t|n"printf("t|6. order|n"printf("t|n"printf("t|7. number|n"printf("t|n"printf("t|n"printf("n" );printf("n" );printf(I!choose( 0 7 ):");););););););););););););););););

8、););); void input() int i,m=0;char ch2;FILE *fp;if (fp=fopen( "d:data.txt" , "ab+" )=NULL) /* 打开指定文件 */printf( "can not openn" ); return ; /* 返回主函数 */while (!feof(fp) /*feof() 函数是用来判断指针是否已经到达文件尾部的， 若指针指向文件末尾，则返回值为 “真 ”， if (fread(&stum,LEN,1,fp)=1) m+; /* 统计当前记录条数 *

9、/ fclose(fp); if (m=0) printf( "No record!n" ); else system( "cls" );show(); /*调用show函数，显示原有信息*/if (fp=fopen( "d:data.txt" , "wb" )=NULL)printf( "can not openn" );return ; for (i=0;i<m;i+) fwrite(&stum,LEN,1,fp);/* 向指定磁盘文件写入信息 */printf( "

10、please input (y/n):/n");scanf( "%s",&ch);if (strcmp(ch, "y" )=0|strcmp(ch, "Y" )=0) printf("please input per centum:");printf("nelective:" );scanf( "%f" ,&Ielec);printf( "/nexperiment:" );scanf( "%f" ,&I

11、expe);printf( "/nrequired course:" );scanf( "%f" ,&Irequ);while (strcmp(ch, "y" )=0|strcmp(ch, "Y" )=0)printf( "number:" );scanf( "%d",&stum.num);/* 输入学生学号 */for (i=0;i<m;i+)if (stui.num=stum.num)返回。 */); printf( "the number

12、 is existing,press any to continue!"更多精品文档getch();fclose(fp);return ;printf( "name:" );scanf( "%s" ,&);/* 输入学生姓名 */printf( "elective:" );scanf( "%lf" ,&stum.elec); /* 输入选修课成绩 */ printf( "experiment:" );scanf( "%lf" ,&a

13、mp;stum.expe); /* 输入实验课成绩 */printf( "required course:");scanf( "%lf" ,&stum.requ); /* 输入必修课成绩 */ stum.sum=stum.elec*Ielec+stum.expe*Iexpe+stum.requ*Irequ;绩*/if (fwrite(&stum,LEN,1,fp)!=1) /* 将新录入的信息写入指定的磁盘文件/* 计算出总成*/printf( "can not save!" ); getch();elseprintf

14、( "%s saved!n" ,);m+;printf( "continue?(y/n):" scanf( "%s" ,ch);fclose(fp);printf( "OK!n" );); /* 询问是否继续 */void search()FILE *fp;int snum,i,m=0;char ch2;if (fp=fopen( "d:data.txt"printf( "can not openn"/* 自定义查找函数 */, "ab+"

15、; )=NULL);returnwhile (!feof(fp)if (fread(&stum,LEN,1,fp)=1)m+;if (m=0)printf( "no record!n");return ;printf( "please input the number:" );scanf( "%d",&snum); /* 输入需要查找学生的学号 */ for (i=0;i<m;i+)if (snum=stui.num) /* 查找出入的学号是否在记录中 */printf( "find the stude

16、nt,show?(y/n)");scanf( "%s" ,ch);if (strcmp(ch, "y" )=0|strcmp(ch, "Y" )=0)printf( "number name elective experiment requiredsumtn" );printf(FORMAT,DATA); /* 将查找出得结果按指定格式输出 */ break ;if (i=m)printf( "can not find the student!n"); /* 没有找到要查额信息 */s

17、ystem( "pause" );void modify() /* 自定义修改函数 */int i,j,snum,m=0;FILE *fp;if (fp=fopen( "d:data.txt" , "ab+" )=NULL)printf( "can not openn" );return ;while (!feof(fp)if (fread(&stum,LEN,1,fp)=1)m+;if (m=0)printf( "no record!n" ); fclose(fp);return ;p

18、rintf( "please input the number of the student which do you want to modify!n");scanf( "%d" ,&snum);for (i=0;i<m;i+)if (snum=stui.num) /* 检索记录中是否有要修改的信息 */ break ;if (i<m)printf( "find the student! you can modify now!n");printf( "please input per centnm:&q

19、uot;);printf( "nelective:" );scanf( "%f" ,&Ielec);printf( "nexperiment:" );scanf( "%f" ,&Iexpe);printf( "nrequired course:" ); scanf( "%f" ,&Irequ);printf( "name:n" );scanf("%s" ,&);printf( "

20、;nelective:" );scanf("%lf" ,&stui.elec);printf( "nexperiment:" );scanf("%lf" ,&stui.expe);printf( "nrequired course:" ); scanf("%lf" ,&stui.requ);stui.sum=stui.elec*Ielec+stui.expe*Iexpe+stui.requ*Irequ; else);, "wb" )=NULL

21、);printf( "can not find!" getch();return ;if (fp=fopen( "d:data.txt"printf( "can not openn" return ;for (j=0;j<m;j+)if (fwrite(&stuj,LEN,1,fp)!=1)printf( "can not save!" );getch();fclose(fp);void del() /* 自定义删除函数 */int snum,i,j,m=0;char ch2;FILE *fp;if

22、(fp=fopen( "d:data.txt" , "ab+" )=NULL) printf( "can not openn" ); return ;while (!feof(fp)if (fread(&stum,LEN,1,fp)=1)m+; fclose(fp);if (m=0) printf( "no record!n" );return ;);printf( "please input the number:"scanf( "%d" ,&snum);f

23、or (i=0;i<m;i+)if (snum=stui.num)break ;);printf( "find the student,delete?(y/n)"scanf( "%s" ,ch);ifif(strcmp(ch, "y" )=0|strcmp(ch, "Y" )=0) for (j=i;j<m;j+) stuj=stuj+1; m-;(fp=fopen( "d:data.txt","wb" )=NULL)文件中 */voidinsert() forp

24、rintf( "can not openn" return ;);(j=0;j<m;j+)if (fwrite(&stuj,LEN,1,fp)!=1)printf( "can not save!n" getch();fclose(fp);printf( "delete successfully!n"/* 自定义插入函数 */int i,j,k,snum,m=0; FILE *fp;(fp=fopen( "d:data.txt"ifprintf( "can not openn" re

25、turn ;););, "ab+" )=NULL); while (!feof(fp)if (fread(&stum,LEN,1,fp)=1) m+;if (m=0)printf( "no record!n" ); fclose(fp);return ;/* 将更改后的记录重新写入指定的磁盘printf( "please input the position where you want to insert!n");scanf( "%d",&snum); /* 输入要插入的位置 */for (i=0

26、;i<m;i+)if (snum=stui.num) break ;for (j=m-1;j>i;j-)stuj+1=stuj; /* 从最后一条记录开始均向后移一位 */ printf( "please input the new information:n");printf( "number:" );scanf( "%d" ,&stui+1.num);for (k=0;k<m;k+)if (stuk.num=stui+1.num&&k!=i+1)printf( "the numb

27、er is existing,press any to continue!");getch();fclose(fp);return ;printf( "please input per centum:");printf( "nelective:" );scanf( "%f" ,&Felec);printf( "nexperiment:" );scanf( "%f" ,&Fexpe);printf( "nrequired course:" );scan

28、f( "%f" ,&Frequ);printf( "name:n" );scanf("%s" ,&stui+1.name);printf( "nelective:" );scanf("%lf" ,&stui+1.elec);printf( "nexperiment:" );scanf("%lf" ,&stui+1.expe);printf("nrequired course:");scanf("%lf" ,&stui+1.requ);/*stui+1.sum=stui+1.elec*Felec+stui+1.expe*Fexpe+stui+1.requ*Frequ;计算总成绩 */if (fp=fopen( "d:data.txt", "wb" )=NULL)printf( "can not openn" ); return ;for (k=0;k<=m;k+)if (fwrite(&stuk,LEN,1,fp)!=1) /* 将修改后的