c语言学生成绩管理系统附源代码v1.0 免费版下载-可可软件园

软件介绍

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。

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

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||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);

}

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