【C语言程序】学生成绩管理系统

bfgjjt

有许多朋友要求出一个比较难的程序，今天给大家分享一个C语言环境下开发的学生成绩管理系统
这个系统原理很简单：成绩的录入，输出，修改，排序，删除等等。
主要目的是帮大家温习C语言的使用。
【软件获取】请查看附件
【源代码】
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#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%-12.1lf\n" #define DATA stu.num,stu.name,stu.elec,stu.expe,stu.requ,stu.sum //仅供学习使用，起切勿用作商业用途！ float Felec,Fexpe,Frequ; struct student/*定义学生成绩结构体*/ {         int num;/*学号*/         char name[15];/*姓名*/         double elec;/*选修课*/         double expe;/*实验课*/         double requ;/*必修课*/         double sum;/*总分*/ }; struct student stu[50];/*定义结构体数组*/ void in();/*录入学生成绩信息*/ void show();/*显示学生信息*/ void order();/*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*/ int main()/*主函数*/ {         int n;         menu();         scanf("%d",&n);/*输入选择功能的编号*/         while(n)         {                 switch(n)                 {                 case 1:                         in();                         break;                 case 2:                         search();                         break;                 case 3:                         del();                         break;                 case 4:                         modify();                         break;                 case 5:                         insert();                         break;                 case 6:                         order();                         break;                 case 7:                         total();                         break;                 default:break;                 }                 getch();                 menu();/*执行完功能再次显示菜单界面*/                 scanf("%d",&n);         } }     void in()/*录入学生信息*/ {         int i,m=0;/*m是记录的条数*/         char ch[2];         FILE *fp;/*定义文件指针*/         if((fp=fopen("data","ab+"))==NULL)/*打开指定文件*/         {                 printf("can not open\n");                 return;         }         while(!feof(fp))         {                 if(fread(&stu[m] ,LEN,1,fp)==1)                         m++;/*统计当前记录条数*/         }         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("data","wb"))==NULL)         {                 printf("can not open\n");                 return;         }         for(i=0;i<m;i++)                 fwrite(&stu ,LEN,1,fp);/*向指定的磁盘文件写入信息*/         printf("please input(y/n):");         scanf("%s",ch);         if(strcmp(ch,"Y")==0||strcmp(ch,"y")==0)         {                 printf("please input per centum:");                 printf("\nelective:");                 scanf("%f",&Felec);                 printf("\nexperiment:");                 scanf("%f",&Fexpe);                 printf("\nrequired course:");                 scanf("%f",&Frequ);         }         while(strcmp(ch,"Y")==0||strcmp(ch,"y")==0)/*判断是否要录入新信息*/         {                 printf("number:");                 scanf("%d",&stu[m].num);/*输入学生学号*/                 for(i=0;i<m;i++)                         if(stu.num==stu[m].num)                         {                                 printf("the number is existing,press any to continue!");                                 getch();                                 fclose(fp);                                 return;                         }                         printf("name:");                         scanf("%s",stu[m].name);/*输入学生姓名*/                         printf("elective:");                         scanf("%lf",&stu[m].elec);/*输入选修课成绩*/                         printf("experiment:");                         scanf("%lf",&stu[m].expe);/*输入实验课成绩*/                         printf("required course:");                         scanf("%lf",&stu[m].requ);/*输入必修课成绩*/                         stu[m].sum=stu[m].elec*Felec+stu[m].expe*Fexpe+stu[m].requ*Frequ;/*计算出总成绩*/                         if(fwrite(&stu[m],LEN,1,fp)!=1)/*将新录入的信息写入指定的磁盘文件*/                         {                                 printf("can not save!");                                 getch();                         }                         else                         {                                 printf("%s saved!\n",stu[m].name);                                 m++;                         }                         printf("continue?(y/n):");/*询问是否继续*/                         scanf("%s",ch);         }         fclose(fp);         printf("OK!\n"); }     void show() {         FILE *fp;         int i,m=0;         fp=fopen("data","ab+");         while(!feof(fp))         {                 if(fread(&stu[m] ,LEN,1,fp)==1)                         m++;         }          fclose(fp);         printf("number  name           elective    experiment  required    sum\t\n");         for(i=0;i<m;i++)         {                 printf(FORMAT,DATA);/*将信息按指定格式打印*/         } }     void menu()/*自定义函数实现菜单功能*/ {         system("cls");         printf("\n\n\n\n\n");         printf("\t\t|---------------------STUDENT-------------------|\n");         printf("\t\t|\t 0. exit                                |\n");         printf("\t\t|\t 1. input record                        |\n");         printf("\t\t|\t 2. search record                       |\n");         printf("\t\t|\t 3. delete record                       |\n");         printf("\t\t|\t 4. modify record                       |\n");         printf("\t\t|\t 5. insert record                       |\n");         printf("\t\t|\t 6. order                               |\n");         printf("\t\t|\t 7. number                              |\n");         printf("\t\t|--------该程序由吾爱破解bfgjjt提供-------------|\n\n");         printf("\t\t\tchoose(0-7):"); }     void order()/*自定义排序函数*/ {         FILE *fp;         struct student t;         int i=0,j=0,m=0;         if((fp=fopen("data","ab+"))==NULL)         {                 printf("can not open!\n");                 return;         }         while(!feof(fp))                 if(fread(&stu[m] ,LEN,1,fp)==1)                         m++;                 fclose(fp);                 if(m==0)                 {                         printf("no record!\n");                         return;                 }                 for(i=0;i<m-1;i++)                         for(j=i+1;j<m;j++)/*双重循环实现成绩比较并交换*/                                 if(stu.sum<stu[j].sum)                                 {                                         t=stu;                                         stu=stu[j];                                         stu[j]=t;                                 }                                 if((fp=fopen("data","wb"))==NULL)                                 {                                         printf("can not open\n");                                         return;                                 }                                 for(i=0;i<m;i++)/*将重新排好序的内容重新写入指定的磁盘文件中*/                                         if(fwrite(&stu ,LEN,1,fp)!=1)                                         {                                                 printf("%s can not save!\n");                                                 getch();                                         }                                         fclose(fp);                                         printf("save successfully\n"); } void del()/*自定义删除函数*/ {         FILE *fp;         int snum,i,j,m=0;         char ch[2];         if((fp=fopen("data","ab+"))==NULL)         {                 printf("can not open\n");                 return;         }         while(!feof(fp))                  if(fread(&stu[m],LEN,1,fp)==1)                         m++;                 fclose(fp);                 if(m==0)                 {                         printf("no record!\n");                         return;                 }                 printf("please input the number:");                 scanf("%d",&snum);                 for(i=0;i<m;i++)                         if(snum==stu.num)                                 break;                  if(i==m)                         {                         printf("can not find");                         getchar();                         return;                         }                         printf("find the student,delete?(y/n)");                         scanf("%s",ch);                         if(strcmp(ch,"Y")==0||strcmp(ch,"y")==0)/*判断是否要进行删除*/                         {                                 for(j=i;j<m;j++)                                         stu[j]=stu[j+1];/*将后一个记录移到前一个记录的位置*/                                         m--;/*记录的总个数减1*/                                         printf("delete successfully!\n");                                 }                                 if((fp=fopen("data","wb"))==NULL)                                 {                                         printf("can not open\n");                                         return;                                 }                                 for(j=0;j<m;j++)/*将更改后的记录重新写入指定的磁盘文件中*/                                         if(fwrite(&stu[j] ,LEN,1,fp)!=1)                                         {                                                 printf("can not save!\n");                                                 getch();                                         }                                         fclose(fp);                                   }     void search()/*自定义查找函数*/ {         FILE *fp;         int snum,i,m=0;         char ch[2];         if((fp=fopen("data","ab+"))==NULL)         {                 printf("can not open\n");                 return;         }         while(!feof(fp))                 if(fread(&stu[m],LEN,1,fp)==1)                         m++;                 fclose(fp);                 if(m==0)                 {                         printf("no record!\n");                         return;                 }                 printf("please input the number:");                 scanf("%d",&snum);                 for(i=0;i<m;i++)                         if(snum==stu.num)/*查找输入的学号是否在记录中*/                         {                                 printf("find the student,show?(y/n)");                                 scanf("%s",ch);                                 if(strcmp(ch,"Y")==0||strcmp(ch,"y")==0)                                 {                                         printf("number  name           elective    experiment  required    sum\t\n");                                         printf(FORMAT,DATA);/*将查找出的结果按指定格式输出*/                                         break;                                 }                                 else                                         return;                         }                           if(i==m)                                 printf("can not find the student!\n");/*未找到要查找的信息*/ }     void modify()/*自定义修改函数*/ {         FILE *fp;         int i,j,m=0,snum;         if((fp=fopen("data","ab+"))==NULL)         {                 printf("can not open\n");                 return;         }         while(!feof(fp))                  if(fread(&stu[m],LEN,1,fp)==1)                         m++;                 if(m==0)                 {                         printf("no record!\n");                         fclose(fp);                         return;                 }                 printf("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==stu.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!\n");                                 printf("please input per centum:");                                 printf("\nelective:");                                 scanf("%f",&Felec);                                 printf("\nexperiment:");                                 scanf("%f",&Fexpe);                                 printf("\nrequired course:");                                 scanf("%f",&Frequ);                                 printf("name:\n");                                 scanf("%s",stu.name);/*输入名字*/                                 printf("\nelective:");                                 scanf("%lf",&stu.elec);/*输入选修课成绩*/                                 printf("\nexperiment:");                                 scanf("%lf",&stu.expe);/*输入实验课成绩*/                                 printf("\nrequired course:");                                 scanf("%lf",&stu.requ);/*输入必修课成绩*/                                 stu.sum=stu.elec*Felec+stu.expe*Fexpe+stu.requ*Frequ;                         }                         else                         {                                 printf("can not find!");                                 getchar();                                 return;                         }                         if((fp=fopen("data","wb"))==NULL)                         {                                 printf("can not open\n");                                 return;                         }                         for(j=0;j<m;j++)/*将新修改的信息写入指定的磁盘文件中*/                                 if(fwrite(&stu[j] ,LEN,1,fp)!=1)                                 {                                         printf("can not save!");                                         getch();                                 }                                 fclose(fp); }     void insert()/*自定义插入函数*/ {         FILE *fp;         int i,j,k,m=0,snum;         if((fp=fopen("data","ab+"))==NULL)         {                 printf("can not open\n");                 return;         }         while(!feof(fp))                  if(fread(&stu[m],LEN,1,fp)==1)                         m++;                 if(m==0)                 {                         printf("no record!\n");                         fclose(fp);                         return;                 }                 printf("please input position where do you want to insert!(input the number)\n");                 scanf("%d",&snum);/*输入要插入的位置*/                 for(i=0;i<m;i++)                         if(snum==stu.num)                                 break;                         for(j=m-1;j>i;j--)                                 stu[j+1]=stu[j];/*从最后一条记录开始均向后移一位*/                         printf("now please input the new information.\n");                         printf("number:");                         scanf("%d",&stu[i+1].num);                         for(k=0;k<m;k++)                                 if(stu[k].num==stu[i+1].num&&k!=i+1)                                 {                                         printf("the number 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:");                                 scanf("%f",&Frequ);                                 printf("name:\n");                                 scanf("%s",stu[i+1].name);                                 printf("\nelective:");                                 scanf("%lf",&stu[i+1].elec);                                 printf("\nexperiment:");                                 scanf("%lf",&stu[i+1].expe);                                 printf("\nrequired course:");                                 scanf("%lf",&stu[i+1].requ);                                 stu[i+1].sum=stu[i+1].elec*Felec+stu[i+1].expe*Fexpe+stu[i+1].requ*Frequ;                                 if((fp=fopen("data","wb"))==NULL)                                 {                                         printf("can not open\n");                                         return;                                 }                                 for(k=0;k<=m;k++)                                         if(fwrite(&stu[k] ,LEN,1,fp)!=1)/*将修改后的记录写入磁盘文件中*/                                         {                                                 printf("can not save!");                                                 getch();                                         }                                         fclose(fp); }     void total() {         FILE *fp;         int m=0;         if((fp=fopen("data","ab+"))==NULL)         {                         printf("can not open\n");                 return;         }         while(!feof(fp))                  if(fread(&stu[m],LEN,1,fp)==1)                         m++;/*统计记录个数即学生个数*/                 if(m==0)                 {                         printf("no record!\n");                         fclose(fp);                         return;                 }                 printf("the class are %d students!\n",m);/*将统计的个数输出*/                 fclose(fp); }

heang567

这个是课程设计的题目吧！

明月相照

记得当时也用C做过类似的，参考FOX的数据库的功能和菜单做个简单的，当时排除错误就记得是用时很久。叹......
对分检索算法和排序什么的，搞了好些天。

mengsiyiren

可以，学习了

SPDPK_蛛侍

好厉害。。

苏苏啊

不错 课程设计可以复用下

西瓜小刚

谢谢 分享 值得学习

MYLQG2ZHX

谢谢分享

Edgar123

观摩学习.

A羽飞

666，我只会VBA

lanzhimimi

太牛了。谢谢楼主分享代码  正想在复习一下C语言呢。