怎么用C語(yǔ)言實(shí)現(xiàn)學(xué)生成績(jī)管理系統(tǒng)

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1、數(shù)據(jù)結(jié)構(gòu)：學(xué)生信息：學(xué)號(hào)、姓名、年齡、性別、3課成績(jī)

2、功能：

(1)  增加學(xué)生記錄
(2)  刪除學(xué)生記錄
(3)  查找學(xué)生信息(學(xué)號(hào)、姓名)
(4)  修改學(xué)生信息
(5)  按照成績(jī)排序、求平均值、最大值、最小值

3、用戶(hù)界面

   主菜單
   子菜單

4、 批量生成測(cè)試數(shù)據(jù)

//
//  main.c
//  Student System
//
//  Created by ma c on 15/7/22.
//  Copyright (c) 2015年. All rights reserved.
//  要求：編寫(xiě)一個(gè)學(xué)生成績(jī)管理系統(tǒng)。

#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(shù)據(jù)
void add(struct Student stu[],int pos,int nums);


//刪除數(shù)據(jù)
void Delete_name(struct Student *stu,char Name[]);//(按姓名)
void Delete_sno(struct Student *stu,int Sno);//(按學(xué)號(hào))


//修改數(shù)據(jù)
void update(struct Student stu[],int Sno,int len);


//查詢(xún)子菜單
void menu(struct Student stu[],int m);
void search(struct Student stu[],int n,char Name[]);//按姓名查詢(xún)
void search2(struct Student stu[],int n,int Num);//按學(xué)號(hào)查詢(xún)
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(xué)生記錄 **\n");
    printf("** 2.刪除學(xué)生記錄 **\n");
    printf("** 3.查找學(xué)生記錄 **\n");
    printf("** 4.修改學(xué)生記錄 **\n");
    printf("** 0.退出管理系統(tǒng) **\n");
    printf("------------------\n");
}

//刪除子菜單
void deleteScreen()
{
    printf("------------------\n");
    printf("** 0.按姓名刪除數(shù)據(jù)**\n");
    printf("** 1.按學(xué)號(hào)刪除數(shù)據(jù)**\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(xué)號(hào)查找信息    *\n");
    printf("****** 3.查看所有學(xué)生成績(jī)  *\n");
    printf("****** 4.成績(jī)名次排序(總分)*\n");
    printf("****** 5.查看成績(jī)最優(yōu)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(tài)變量,統(tǒng)計(jì)目前結(jié)構(gòu)體數(shù)組中的人數(shù)
static int count = 10;


//主函數(shù)
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(shù)據(jù)
              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(shù)據(jù)(按姓名刪除)
                      break;
                  case 1:
                      printf("please input delete sno:");
                      scanf("%d",&snos);
                      Delete_sno(stu,snos); //刪除數(shù)據(jù)(按學(xué)號(hào)刪除)
                      break;
                  case 2:
                      break;
              }
              getchar();
              break;
        case '3':
              menu(stu,count);//查找數(shù)據(jù)
              getchar();
              break;
        case '4':
              printf("please input update sno:");
              scanf("%d",&snos);
              update(stu,snos,count);     //修改數(shù)據(jù)
              break;
        case '0':
              exit(0);                    //退出系統(tǒng)
        default:
              printf("data is illeagel!\n");
              getchar();
              break;                      //輸入非法
    }
 }
 return 0;
}

//添加數(shù)據(jù)
void add(struct Student stu[],int pos,int nums)//開(kāi)始位置、添加人數(shù)
{
    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(xué)生信息添加成功!\n");
    }
    count = count + nums;
}

//按學(xué)號(hào)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(xué)號(hào)為%d的學(xué)生已被刪除\n",Sno);
            printf("\n");
            flag=1;
            count = count-1;
            break;
        }
    }
    if(flag==0)
        printf("學(xué)號(hào)%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(xué)生:%s 已被刪除.\n",Name);
            printf("\n");
            flag=flag+1;
            count =count -1;
        }
    }
    if(flag==0)
        printf("學(xué)生:%s 不存在.\n",Name);
}

//修改數(shù)據(jù)
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(xún)數(shù)據(jù)
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(qǐng)輸入同學(xué)的姓名: ");
                scanf("%s",name);
                search(stu,count,name);
                break;
            case 2 :
                printf("\n請(qǐng)輸入同學(xué)的學(xué)號(hào): ");
                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(shù)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(jī)最優(yōu)的同學(xué):");
    My_print_sum(stu,0);

    printf("成績(jī)最差的同學(xué):");
    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(xué)號(hào):%d,年齡:%d,性別:%c,英語(yǔ):%.2f,數(shù)學(xué):%.2f,語(yǔ)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));
}

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