C语言实现学生成绩管理系统项目
本文实例为大家分享了C语言实现学生成绩管理系统项目，供大家参考，具体内容如下
1、数据结构：学生信息：学号、姓名、年龄、性别、3课成绩
2、功能：
(1) 增加学生记录
(2) 删除学生记录
(3) 查找学生信息(学号、姓名)
(4) 修改学生信息
(5) 按照成绩排序、求平均值、最大值、最小值
3、用户界面
主菜单
子菜单
4、 批量生成测试数据
//
// main.c
// Student System
//
// Created by ma c on 15/7/22.
// Copyright (c) 2015年. All rights reserved.
// 要求：编写一个学生成绩管理系统。
#include <stdio.h>
#include<string.h>
#include<stdlib.h>
#define N 50
struct Student{
char name[20];
int sno;
int age;
char gender;
float EnglishScore;
float mathScore;
float chineseScore;
}stu[N]={{"zhao",1000,20,'M',98,99,97},
{"zhao",1001,21,'F',97,96,95},
{"qian",1002,23,'M',95,96,92},
{"hong",1003,22,'F',91,93,97},
{"zhou",1004,25,'M',90,90,90},
{"feng",1005,21,'F',96,93,96},
{"wang",1006,23,'M',97,91,90},
{"chen",1007,21,'F',94,92,91},
{"geng",1008,20,'F',90,99,91},
{"tang",1009,24,'M',99,99,99}};
//添加数据
void add(struct Student stu[],int pos,int nums);
//删除数据
void Delete_name(struct Student *stu,char Name[]);//(按姓名)
void Delete_sno(struct Student *stu,int Sno);//(按学号)
//修改数据
void update(struct Student stu[],int Sno,int len);
//查询子菜单
void menu(struct Student stu[],int m);
void search(struct Student stu[],int n,char Name[]);//按姓名查询
void search1(struct Student stu[],int n,int Num);//按学号查询
void sort(struct Student stu[],int n); //按总分高低排序
void print(struct Student stu[],int n);
void My_print_sum(struct Student stu[],int n);
void max_min(struct Student stu[],int n);
//主菜单
void PrintScreen()
{
printf("------------------\n");
printf("** 1.增加学生记录 **\n");
printf("** 2.删除学生记录 **\n");
printf("** 3.查找学生记录 **\n");
printf("** 4.修改学生记录 **\n");
printf("** 0.退出管理系统 **\n");
printf("------------------\n");
}
//删除子菜单
void deleteScreen()
{
printf("------------------\n");
printf("** 0.按姓名删除数据**\n");
printf("** 1.按学号删除数据**\n");
printf("** 2.返回主菜单 **\n");
printf("------------------\n");
printf("please select 0-1:");
}
//查找子菜单
void seekScreen()
{
printf("-------------------------\n");
printf("****** 1.按姓名查找信息 *\n");
printf("****** 2.按学号查找信息 *\n");
printf("****** 3.查看所有学生成绩 *\n");
printf("****** 4.成绩名次排序(总分)*\n");
printf("****** 5.查看成绩最优最差 *\n");
printf("****** 6.返回主菜单 *\n");
printf("-------------------------\n");
printf("please you select 1-6:");
}
//定义全局静态变量,统计目前结构体数组中的人数
static int count = 10;
//主函数
int main(int argc, const char * argv[])
{
int nums,temp;
int snos;
char names[20];
while(1)
{
PrintScreen();
printf("please press enter_key continue!\n");
getchar();
printf("please select 0-4:");
char c = getchar();
switch(c)
{
case '1':
printf("please student'numbers you want to add:");
scanf("%d",&nums);
add(stu,count,nums); //添加数据
getchar();
break;
case '2':
deleteScreen();
scanf("%d",&temp);
switch(temp)
{
case 0:
printf("please input delete name:");
scanf("%s",names);;
Delete_name(stu,names); //删除数据(按姓名删除)
break;
case 1:
printf("please input delete sno:");
scanf("%d",&snos);
Delete_sno(stu,snos); //删除数据(按学号删除)
break;
case 2:
break;
}
getchar();
break;
case '3':
menu(stu,count);//查找数据
getchar();
break;
case '4':
printf("please input update sno:");
scanf("%d",&snos);
update(stu,snos,count); //修改数据
break;
case '0':
exit(0); //退出系统
default:
printf("data is illeagel!\n");
getchar();
break; //输入非法
}
}
return 0;
}
//添加数据
void add(struct Student stu[],int pos,int nums)//开始位置、添加人数
{
for(int i=pos;i<pos+nums;i++)
{
printf("please input name:");
scanf("%s",stu[i].name);
int flag = 1,sno;
while(flag)
{
printf("please input sno:");
scanf("%d",&sno);
for(int j=0;j<pos;j++)
{
if(stu[j].sno==sno)
{
printf("sno is exist!\n");
break;
}
else
{
flag = 0;
}
}
stu[i].sno = sno;
}
printf("please input age:");
scanf("%d",&stu[i].age);
printf("please input gender:(f/m or F/M)");
getchar();
scanf("%c",&stu[i].gender);
printf("please input EnglishScore:");
scanf("%f",&stu[i].EnglishScore);
printf("please input mathScore:");
scanf("%f",&stu[i].mathScore);
printf("please input ChineseScore:");
scanf("%f",&stu[i].chineseScore);
printf("学生信息添加成功!\n");
}
count = count + nums;
}
//按学号删除
void Delete_sno(struct Student *stu,int Sno)
{
if(count==0)
{
printf("成员已为空!\n");
return;
}
int flag=0;
for(int i=0;i<count;i++)
{
if((stu+i)->sno==Sno)
{
for(int j=i;j<count;j++)
{
*(stu+j)=*(stu+j+1);
}
printf("\n");
printf("学号为%d的学生已被删除\n",Sno);
printf("\n");
flag=1;
count = count-1;
break;
}
}
if(flag==0)
printf("学号%d不存在.\n",Sno);
}
//按姓名删除
void Delete_name(struct Student *stu,char Name[])
{
if(count==0)
{
printf("成员已为空!\n");
return;
}
int flag=0;
int n=count;
for(int i=0;i<n;i++)
{
if(strcmp((stu+i-flag)->name,Name)==0)
{
for(int j=i-flag;j<count;j++)
{
*(stu+j)=*(stu+j+1);
}
printf("\n");
printf("学生:%s 已被删除.\n",Name);
printf("\n");
flag=flag+1;
count =count -1;
}
}
if(flag==0)
printf("学生:%s 不存在.\n",Name);
}
//修改数据
void update(struct Student stu[],int sno,int len)
{
char cs,cs1,cs2,cs3;
char p[20];
int grade,i;
for(i=0; i<len; i++)
{
if(sno==stu[i].sno)
{
printf("please ask update name?(y/n):");
getchar();
cs = getchar();
if(cs == 'y')
{
printf("please input a new name:");
scanf("%s",p);
getchar();
strcpy(stu[i].name,p);
printf("update is succeed!\n");
}
printf("please ask update EnglishScore?(y/n):");
cs1 = getchar();
if(cs1 == 'y')
{
printf("please input a new grade:");
scanf("%d",&grade);
stu[i].EnglishScore = grade;
printf("update is succeed!\n");
}
printf("please ask update mathScore?(y/n):");
getchar();
cs2 = getchar();
if(cs2 == 'y')
{
printf("please input a new grade:");
scanf("%d",&grade);
stu[i].mathScore = grade;
printf("update is succeed!\n");
}
printf("please ask update chineseScore?(y/n):");
getchar();
cs3 = getchar();
if(cs3 == 'y')
{
printf("please input a new grade:");
scanf("%d",&grade);
stu[i].chineseScore = grade;
printf("update is succeed!\n");
break;
}
else
{
getchar();
break;
}
}
else if(i==len-1)
{
printf("error,don't have the sno!");
break;
}
else
{
continue;
}
}
}
//查询数据
void menu(struct Student stu[],int m)
{
int logel = 1;
while(logel)
{
seekScreen();
int n;
scanf("%d",&n);
char name[20];
int num;
switch(n)
{
case 1 :
printf("请输入同学的姓名: ");
scanf("%s",name);
search(stu,count,name);
break;
case 2 :
printf("\n请输入同学的学号: ");
scanf("%d",&num);
search1(stu,count,num);
break;
case 3:
print(stu,count);
break;
case 4:
sort(stu,count);
print(stu,count);
break;
case 5:
max_min(stu,count);
break;
case 6:
logel = 0;
break;
default:
logel = 0;
printf("输入数字有误!\n");
break;
}
}
}
void search(struct Student stu[],int n,char Name[])
{
char* p= Name;
int flag = 0;
for(int i=0;i<n;i++)
{
if(strcmp(stu[i].name,p)==0)
{
flag = 1;
My_print_sum(stu,i);
}
}
if(flag==0)
{
printf("the name is not exist!\n");
}
}
void search1(struct Student stu[],int n,int Num)
{
int flag = 0;
for(int i=0;i<n;i++)
{
if(Num==stu[i].sno)
{
flag = 1;
My_print_sum(stu,i);
}
}
if(flag==0)
{
printf("the sno is not exist!\n");
}
}
void sort(struct Student stu[],int n)
{
float sum[N];
for(int i=0;i<n;i++)
{
sum[i]=stu[i].EnglishScore+stu[i].mathScore+stu[i].chineseScore;
}
for(int i=0;i<n-1;i++)
{
for(int j=0;j<n-1-i;j++)
{
if(sum[j]<sum[j+1])
{
float temp1 = sum[j];
sum[j] = sum[j+1];
sum[j+1] = temp1;
struct Student temp;
temp=stu[j];
stu[j]=stu[j+1];
stu[j+1]=temp;
}
}
}
}
void max_min(struct Student stu[],int n)
{
sort(stu,n);
printf("成绩最优的同学:");
My_print_sum(stu,0);
printf("成绩最差的同学:");
My_print_sum(stu,n-1);
}
void print(struct Student stu[],int n)
{
for(int i=0;i<n;i++)
{
My_print_sum(stu,i);
}
}
void My_print_sum(struct Student stu[],int n)
{
printf("\n姓名:%s,学号:%d,年龄:%d,性别:%c,英语:%.2f,数学:%.2f,语文: %.2f,总分:%.2f\n",
stu[n].name,stu[n].sno,stu[n].age,stu[n].gender,
stu[n].EnglishScore,stu[n].mathScore,stu[n].chineseScore,(stu[n].EnglishScore+stu[n].mathScore+stu[n].chineseScore));
}
相关文章
Chynna
2021-04-13
Jacuqeline
2023-07-20
Galatea
2023-07-20
Qamar
2023-07-20
Nancy
2023-07-20
Paula
2023-07-20
Maren
2023-07-20
Lani
2023-07-20
Viveka
2023-07-20
Radinka
2023-07-20
Rayna
2023-07-20
Edda
2023-07-20
Vevina
2023-07-20
Valentina
2023-07-21
Crystal
2023-07-21
Ianthe
2023-07-21
Raissa
2023-07-21
Phemia
2023-07-21
Laila
2023-07-22