這篇“怎么用C語言實現學生成績管理系統”文章的知識點大部分人都不太理解，所以小編給大家總結了以下內容，內容詳細，步驟清晰，具有一定的借鑒價值，希望大家閱讀完這篇文章能有所收獲，下面我們一起來看看這篇“怎么用C語言實現學生成績管理系統”文章吧。
1、數據結構：學生信息：學號、姓名、年齡、性別、3課成績
2、功能：
(1) 增加學生記錄
(2) 刪除學生記錄
(3) 查找學生信息(學號、姓名)
(4) 修改學生信息
(5) 按照成績排序、求平均值、最大值、最小值
3、用戶界面
主菜單
子菜單
4、 批量生成測試數據
//
// main.c
// Student System
//
// Created by ma c on 15/7/22.
// Copyright (c) 2015年. All rights reserved.
// 要求：編寫一個學生成績管理系統。
#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}};
//添加數據
void add(struct Student stu[],int pos,int nums);
//刪除數據
void Delete_name(struct Student *stu,char Name[]);//(按姓名)
void Delete_sno(struct Student *stu,int Sno);//(按學號)
//修改數據
void update(struct Student stu[],int Sno,int len);
//查詢子菜單
void menu(struct Student stu[],int m);
void search(struct Student stu[],int n,char Name[]);//按姓名查詢
void search2(struct Student stu[],int n,int Num);//按學號查詢
void sort(struct Student stu[],int n); //按總分高低排序
void print(struct Student stu[],int n);
void My_print_sum(struct Student stu[],int n);
void max_min(struct Student stu[],int n);
//主菜單
void PrintScreen()
{
printf("------------------\n");
printf("** 1.增加學生記錄 **\n");
printf("** 2.刪除學生記錄 **\n");
printf("** 3.查找學生記錄 **\n");
printf("** 4.修改學生記錄 **\n");
printf("** 0.退出管理系統 **\n");
printf("------------------\n");
}
//刪除子菜單
void deleteScreen()
{
printf("------------------\n");
printf("** 0.按姓名刪除數據**\n");
printf("** 1.按學號刪除數據**\n");
printf("** 2.返回主菜單 **\n");
printf("------------------\n");
printf("please select 0-1:");
}
//查找子菜單
void seekScreen()
{
printf("-------------------------\n");
printf("****** 1.按姓名查找信息 *\n");
printf("****** 2.按學號查找信息 *\n");
printf("****** 3.查看所有學生成績 *\n");
printf("****** 4.成績名次排序(總分)*\n");
printf("****** 5.查看成績最優最差 *\n");
printf("****** 6.返回主菜單 *\n");
printf("-------------------------\n");
printf("please you select 1-6:");
}
//定義全局靜態變量,統計目前結構體數組中的人數
static int count = 10;
//主函數
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); //添加數據
getchar();
break;
case '2':
deleteScreen();
scanf("%d",&temp);
switch(temp)
{
case 0:
printf("please input delete name:");
scanf("%s",names);;
Delete_name(stu,names); //刪除數據(按姓名刪除)
break;
case 1:
printf("please input delete sno:");
scanf("%d",&snos);
Delete_sno(stu,snos); //刪除數據(按學號刪除)
break;
case 2:
break;
}
getchar();
break;
case '3':
menu(stu,count);//查找數據
getchar();
break;
case '4':
printf("please input update sno:");
scanf("%d",&snos);
update(stu,snos,count); //修改數據
break;
case '0':
exit(0); //退出系統
default:
printf("data is illeagel!\n");
getchar();
break; //輸入非法
}
}
return 0;
}
//添加數據
void add(struct Student stu[],int pos,int nums)//開始位置、添加人數
{
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("學生信息添加成功!\n");
}
count = count + nums;
}
//按學號刪除
void Delete_sno(struct Student *stu,int Sno)
{
if(count==0)
{
printf("成員已為空!\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("學號為%d的學生已被刪除\n",Sno);
printf("\n");
flag=1;
count = count-1;
break;
}
}
if(flag==0)
printf("學號%d不存在.\n",Sno);
}
//按姓名刪除
void Delete_name(struct Student *stu,char Name[])
{
if(count==0)
{
printf("成員已為空!\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("學生:%s 已被刪除.\n",Name);
printf("\n");
flag=flag+1;
count =count -1;
}
}
if(flag==0)
printf("學生:%s 不存在.\n",Name);
}
//修改數據
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;
}
}
}
//查詢數據
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("請輸入同學的姓名: ");
scanf("%s",name);
search(stu,count,name);
break;
case 2 :
printf("\n請輸入同學的學號: ");
scanf("%d",&num);
search2(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("輸入數字有誤!\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 search2(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("成績最優的同學:");
My_print_sum(stu,0);
printf("成績最差的同學:");
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,學號:%d,年齡:%d,性別:%c,英語:%.2f,數學:%.2f,語文: %.2f,總分:%.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));
}以上就是關于“怎么用C語言實現學生成績管理系統”這篇文章的內容，相信大家都有了一定的了解，希望小編分享的內容對大家有幫助，若想了解更多相關的知識內容，請關注億速云行業資訊頻道。
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