【C语言程序】学生成绩管理系统
本帖最后由 bfgjjt 于 2018-7-10 16:24 编辑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;/*姓名*/
double elec;/*选修课*/
double expe;/*实验课*/
double requ;/*必修课*/
double sum;/*总分*/
};
struct student stu;/*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;
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 ,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.num);/*输入学生学号*/
for(i=0;i<m;i++)
if(stu.num==stu.num)
{
printf("the number is existing,press any to continue!");
getch();
fclose(fp);
return;
}
printf("name:");
scanf("%s",stu.name);/*输入学生姓名*/
printf("elective:");
scanf("%lf",&stu.elec);/*输入选修课成绩*/
printf("experiment:");
scanf("%lf",&stu.expe);/*输入实验课成绩*/
printf("required course:");
scanf("%lf",&stu.requ);/*输入必修课成绩*/
stu.sum=stu.elec*Felec+stu.expe*Fexpe+stu.requ*Frequ;/*计算出总成绩*/
if(fwrite(&stu,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.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 ,LEN,1,fp)==1)
m++;
}
fclose(fp);
printf("numbername elective experimentrequired 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 ,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.sum)
{
t=stu;
stu=stu;
stu=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;
if((fp=fopen("data","ab+"))==NULL)
{
printf("can not open\n");
return;
}
while(!feof(fp))
if(fread(&stu,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=stu;/*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 ,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;
if((fp=fopen("data","ab+"))==NULL)
{
printf("can not open\n");
return;
}
while(!feof(fp))
if(fread(&stu,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("numbername elective experimentrequired 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,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 ,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,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=stu;/*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.num);
for(k=0;k<m;k++)
if(stu.num==stu.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.name);
printf("\nelective:");
scanf("%lf",&stu.elec);
printf("\nexperiment:");
scanf("%lf",&stu.expe);
printf("\nrequired course:");
scanf("%lf",&stu.requ);
stu.sum=stu.elec*Felec+stu.expe*Fexpe+stu.requ*Frequ;
if((fp=fopen("data","wb"))==NULL)
{
printf("can not open\n");
return;
}
for(k=0;k<=m;k++)
if(fwrite(&stu ,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,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);
}
这个是课程设计的题目吧！ 本帖最后由 明月相照 于 2018-7-10 13:15 编辑
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。 可以，学习了 好厉害。。 不错 课程设计可以复用下 谢谢 分享 值得学习 谢谢分享 观摩学习. 下载学习下，谢谢 666，我只会VBA 太牛了。谢谢楼主分享代码正想在复习一下C语言呢。