c语言学生成绩管理系统是一款用C语言设计制作的成绩管理系统,它是由吾爱论坛网友分享提供的,旨在帮助学习C语言的朋友来进行实战运用学习,感兴趣的朋友不要错过了,欢迎下载使用。
c语言学生成绩管理系统附源代码系统说明
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。
c语言学生成绩管理系统附源代码系统功能
1.实现所有学生成绩的录入(利用结构体数组),当输入字符为end时候,结束成绩的录入;
2.实现所有学生信息的输出
3.输入指定学生姓名,并能输出这名学生的信息
4.将学生成绩按照语文和数学成绩排序
c语言学生成绩管理系统附源代码系统源码
#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
c语言学生成绩管理系统附源代码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
c语言学生成绩管理系统附源代码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
c语言学生成绩管理系统附源代码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
c语言学生成绩管理系统附源代码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);}