From 236046441f755bf60fe3606f05d5d4f96c46a68e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E6=9D=A8=E6=A1=93?= <2632716331@qq.com>
Date: Thu, 10 Jan 2019 14:36:27 +0800
Subject: [PATCH] first commit

---
 student.cpp | 574 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 574 insertions(+)
 create mode 100644 student.cpp

diff --git a/student.cpp b/student.cpp
new file mode 100644
index 0000000..ef3de8b
--- /dev/null
+++ b/student.cpp
@@ -0,0 +1,574 @@
+#include"stdio.h"
+#include"windows.h"
+#include"conio.h"
+#include"stdlib.h"
+#include"string.h"
+int menu(); 
+int menu_select(); 
+void tj();
+void cx();
+int xg();
+void xs(); 
+void fd();
+void pm();
+float fm();
+int pass();
+int average();
+int wenjiandiaochu();
+int mima();
+int i,j,k,y;
+FILE *fp;
+struct stu
+{
+int xh;
+char name[30];
+float score;
+};struct stu s[100];
+int main()
+{
+system("color F4");//亮白，红 
+system("pause");
+int e; 
+e=mima();
+if(e==1)
+return 0;
+printf("\n");
+printf("\t*-*-*-*-*-*-*-*-*-*-*-*-*-*\n");
+printf("\t*         好嗨哟！        *\n");
+printf("\t*    恭喜你的人生到达了   *\n");
+printf("\t* 学生C语言成绩记录簿系统 *\n");
+printf("\t*          *^_^*          *\n");
+printf("\t*      *^欢迎使用^*       *\n");
+printf("\t*-*-*-*-*-*-*-*-*-*-*-*-*-*\n");
+printf("\n");
+menu();
+return 0;
+}
+
+int menu()//菜单 
+{
+
+  int n=0;
+  char c,a;
+  n=menu_select();
+  
+switch(n)
+  {
+case 0: tj(); break;//添加 
+case 1: xg(); break;// 修改 
+case 2: xs(); break;//显示 
+case 3: cx();break;//查询 
+case 4: pm();break;//排序 
+case 5: fm();break;//最高和最低分
+case 6: average();break;//平均分 
+case 7: pass();break;//及格率 
+case 8: fd();break;//学生成绩分段 
+case 9: return 0;//结束 
+  }
+  if(0<=n&&n<=8)
+  {
+  	printf("是否继续对学生成绩进行管理，是请输入Y，否请输入N\n");
+  	a=getchar();
+  	 scanf("%c",&c);
+     
+  		if(c=='y'||c=='Y')
+	{
+		system("cls");
+	menu();
+	}
+  
+while(c!='y'&&c!='Y'&&c!='n'&&c!='N')
+ {
+    printf("你的输入怕是有毛病，现在请重新输入：\n");
+    scanf("%c",&c);
+    getchar();
+    if(c=='y'||c=='Y')
+	{
+		system("cls");
+	menu();
+	}
+	if(c=='n'||c=='N')
+	{
+		return 0;
+	}
+ } 
+
+  }
+}
+
+ int menu_select()//菜单选择 
+{int a;
+printf("\n");
+printf("\t*-*-*-*-*-*-*-*-*-*-*-*-*-*\n");
+printf("\t*-0.   添加学生信息      -*\n");
+printf("\t*-1.   修改学生信息      -*\n");
+printf("\t*-2.   显示学生信息      -*\n");
+printf("\t*-3.   查询学生信息      -*\n");
+printf("\t*-4.   学生信息排序      -*\n");
+printf("\t*-5.   最高和最低分      -*\n");
+printf("\t*-6.      平均分         -*\n");
+printf("\t*-7.      及格率         -*\n");
+printf("\t*-8.   学生成绩分段      -*\n");
+printf("\t*-9.   结束运行          -*\n");
+printf("\t*-*-*-*-*-*-*-*-*-*-*-*-*-*\n");
+printf("\n\t请输入功能选择对应的数据, 请选0~9:\n");
+scanf("%d",&a);
+getchar();//接收回车符
+  while(!(a>=0&&a<=9))
+  {
+  	printf("你的输入怕是有点问题哦，麻烦再输入一次");
+	scanf("%d",&a);
+	getchar();
+  }
+return a;
+}
+
+int xg() //修改                     
+{
+FILE *fp1;
+char st[30];
+int num,k,x,id;
+float nu;
+system("cls");
+wenjiandiaochu();
+if((fp1=fopen("学生人数.txt","r"))==NULL)
+	{ 
+	printf("文件冇得办法打开");
+	return 0;
+    }   
+	fscanf(fp1,"%d",&k);
+	fclose(fp1);                           
+printf("学号修改请按1，姓名修改请按2,莫要选错了：\n");
+scanf("%d",&x);
+while(x!=1&&x!=2)
+ {
+    printf("你的输入怕是有毛病，现在请重新输入：\n");
+    scanf("%d",&x);
+ } 
+if(x==1)
+{
+printf("现在输入修改成绩人的学号：\n");
+scanf("%d",&num);
+for(int i=0;i<k;i++)
+{ 
+if(num==s[i].xh)
+{
+printf("请输入修改后的学号：\n");
+scanf("%d",&id);
+s[i].xh=id;
+printf("请输入修改后的姓名：\n");
+scanf("%s",st);
+strcpy(s[i].name,st);
+printf("请输入修改后的成绩：\n");
+scanf("%f",&nu);
+getchar();
+s[i].score=nu; 
+fp=fopen("student.txt","w+");
+for(i=0;i<k;i++)   
+fprintf(fp,"%d %s %.1f\n",s[i].xh,s[i].name,s[i].score);
+fclose(fp);
+printf("搞定\n");
+return 0;
+}
+} 
+printf("冒油找到这个学生的信息\n");
+return 0;
+}
+if(x==2)
+{
+printf("现在输入修改成绩人的姓名：\n");
+scanf("%s",st);
+for(int i=0;i<k;i++)
+{ 
+if(strcmp(s[i].name,st)==0)
+{
+char str[30];
+printf("请输入修改后的学号：\n");
+scanf("%d",&id);
+s[i].xh=id;
+printf("请输入修改后的姓名：\n");
+scanf("%s",st);
+strcpy(s[i].name,st);
+printf("请输入修改后的成绩：\n");
+scanf("%f",&nu);
+getchar();
+for(i=0;i<k;i++)   
+fprintf(fp,"%d %s %.1f\n",s[i].xh,s[i].name,s[i].score);
+fclose(fp);
+printf("搞定\n");
+return 0;
+}
+} 
+printf("冒油找到这个学生的信息\n");
+return 0;
+}
+}
+
+void cx()//查询 
+{
+FILE *fp1;
+char st[30];
+int x,num,k=0;
+wenjiandiaochu();
+system("cls");
+if((fp1=fopen("学生人数.txt","r"))==NULL)
+	{ 
+	printf("文件冇得办法打开");
+	exit(0);
+    }   
+	fscanf(fp1,"%d",&k);
+	fclose(fp1);
+
+printf("学号查询请按1，姓名查询请按2。莫要选错了:\n");
+scanf("%d",&x);
+while(x!=1&&x!=2)
+ {
+    printf("你的输入怕是有毛病，现在请重新输入：\n");
+    scanf("%d",&x);
+ } 
+if(x==1)
+{
+printf("现在输入需要查询的学号：\n");
+scanf("%d",&num);
+for(int i=0;i<k;i++)
+if(num==s[i].xh)
+{
+printf("学号：%d\n姓名：%s\n成绩：%.1f\n",s[i].xh,s[i].name,s[i].score);
+return;     
+}
+printf("冒得这个学生的信息\n");
+return; 
+}
+if(x==2)
+{printf("现在输入需要查询的姓名：\n");
+scanf("%s",st);
+for(int i=0;i<k;i++)
+if(strcmp(s[i].name,st)==0)
+{
+printf("学号：%d\n姓名：%s\n成绩：%.1f\n",s[i].xh,s[i].name,s[i].score);
+return; 
+}
+printf("冒得这个学生的信息\n");
+return; 
+}
+
+}
+
+void tj()//添加 
+{   FILE *fp1;
+    system("cls");
+	int i,j,c;  
+	int a=1;
+	if((fp=fopen("student.txt","a"))==NULL)
+	{ 
+	printf("文件冇得办法打开");
+	return; 
+	}
+	for(i=0;a!=0;)
+	{
+	int d,x;
+	float z;
+	char st[30];
+    printf("现在输入你要添加学生的学号：\n");
+    scanf("%d",&x);
+	getchar();
+    printf("现在输入你要添加学生的姓名：\n");
+    gets(st);
+    printf("现在输入你要添加学生的成绩：\n");
+    scanf("%f",&z);
+	getchar();
+	fprintf(fp,"%d %s %.1f\n",x,st,z);
+	printf("请以0作为输入信息结束！,输入1继续\n");
+	scanf("%d",&d);
+	getchar();//接受回车 
+	a=d;
+	while(a!=1&&a!=0)
+ {
+    printf("你的输入怕是有毛病，现在请重新输入：\n");
+    scanf("%d",&a);
+ } 
+    i++;
+}
+    fclose(fp);
+    
+		if((fp1=fopen("学生人数.txt","r"))==NULL)//修改学生人数.txt文件 
+	{ 
+	printf("文件冇得办法打开");
+	exit(0);
+	}
+	fscanf(fp1,"%d",&j);
+	fclose(fp1);
+	rewind(fp1);
+	if((fp1=fopen("学生人数.txt","w"))==NULL)
+	{ 
+	printf("文件冇得办法打开");
+	exit(0);
+	}   
+	c=j+i;
+	fprintf(fp1,"%d",c);
+	fclose(fp1);
+}
+
+void xs()//显示
+{	system("cls");
+    int ch;
+if((fp=fopen("student.txt","r"))==NULL)
+	{
+		printf("文件打开失败\n");
+		exit(0);
+	}
+printf("\t\t\t全部的学生信息：\n");
+printf("\t****************\n");
+printf("\t*学号 name 成绩*\n");
+printf("\t****************\n");
+while(!feof(fp))
+{
+	ch=fgetc(fp);
+	putchar(ch);
+}
+fclose(fp);
+	
+}
+
+void pm()//排名 
+{
+wenjiandiaochu();
+int i=0,k,m=0,a; 
+char c; 
+float average,pass,sum=0;
+struct stu t;
+FILE *fp1;
+system("cls");
+	if((fp1=fopen("学生人数.txt","r"))==NULL)
+	{ 
+	printf("文件冇得办法打开");
+	exit(0);
+    }   
+	fscanf(fp1,"%d",&k);
+	fclose(fp1);
+	for(i=0;i<k;i++)
+{
+	
+	for(j=i+1;j<k+1;j++)
+{
+
+	if(s[i].score<s[j].score)
+    {
+       t=s[i];
+	   s[i]=s[j];
+	   s[j]=t;
+	}
+}
+}
+    for(i=0;i<k;i++)
+	{  /* sum=sum+s[i].score;
+	if(s[i].score>=60)
+	m++; */
+		printf("\t\t\t第%d名:%d %-4s %.1f\n",i+1,s[i].xh,s[i].name,s[i].score);
+    }
+    printf("是否要将排序后的数据保存，是请按1，否请按0：\n");
+    scanf("%d",&a);
+    c=getchar();//接收回车 
+while(a!=1&&a!=0)
+ {
+    printf("你的输入怕是有毛病，现在请重新输入：\n");
+    scanf("%d",&a);
+ } 
+ if(a==1)
+ {
+ 	if((fp=fopen("student.txt","w+"))==NULL)
+	{ 
+	printf("文件冇得办法打开");
+	exit(0);
+    } 
+ 	for(int l=0;l<k;l++)
+ 	{
+ 	   fprintf(fp,"%d %s %.1f",s[l].xh,s[l].name,s[l].score);
+	   	fprintf(fp,"\n");
+ 	}
+ 	printf("搞定！\n");
+ 	fclose(fp);
+if(a==0)
+{
+	return;
+}
+ }
+	/*average=sum/i;
+    pass=m/i;
+    printf("这门课程学生的最高成绩是：%d",s[0]);
+    printf("这门课程学生的最低成绩是：%d",s[i]);
+    printf("这门课程学生的平均成绩是：%d",average);
+    printf("这门课程学生的及格率是：%d",pass);*/
+} 
+
+void fd()//成绩分段 
+{  int k;
+   FILE *fp1;
+   system("cls");
+   wenjiandiaochu();
+if((fp1=fopen("学生人数.txt","r"))==NULL)
+	{ 
+	printf("文件冇得办法打开");
+	exit(0);
+    }   
+	fscanf(fp1,"%d",&k);
+	fclose(fp1);
+printf("\t\t\t  90分以上学生的信息!\n");
+printf("\t\t\t学号 姓名 成绩：\n");
+for(i=0;i<k;i++)
+if(s[i].score>=90)
+printf("\t\t\t%d %s  %.1f%ld\n",s[i].xh,s[i].name,s[i].score);
+printf("\n\n");
+printf("\t\t\t  80到89分学生的信息!\n");
+printf("\t\t\t学号 姓名 成绩：\n");
+for(i=0;i<k;i++)
+if(s[i].score<90&&s[i].score>=80)
+printf("\t\t\t%d %s  %.1f%ld\n",s[i].xh,s[i].name,s[i].score);
+printf("\n\n");
+printf("\t\t\t  60到79分学生的信息!\n");
+printf("\t\t\t学号 姓名 成绩：\n");
+for(i=0;i<k;i++)
+if(s[i].score>=60&&s[i].score<80)
+printf("\t\t\t%d %s  %.1f%ld\n",s[i].xh,s[i].name,s[i].score);
+printf("\n\n");
+printf("\t\t\t  60分以下学生的信息!\n");
+printf("\t\t\t学号 姓名 成绩：\n");
+for(i=0;i<k;i++)
+if(s[i].score<60)
+printf("\t\t\t%d %s  %.1f%ld\n",s[i].xh,s[i].name,s[i].score);
+printf("\n\n");
+
+}
+
+int wenjiandiaochu()//数据提取 
+ {
+ int i;
+FILE *fp;
+ 	if((fp=fopen("student.txt","a+"))==NULL)
+{
+printf("这个文件打开出了点问题\n");
+exit(0);
+}
+for(i=0;!feof(fp);)
+{
+    fscanf(fp,"%d%s%f",&s[i].xh,&s[i].name,&s[i].score);
+    i++;
+}
+fclose(fp);
+return 0;
+ }
+ 
+float fm()//最高分最低分 
+{   
+    FILE *fp1;
+    int k;
+    float max,min,sum=0;
+	wenjiandiaochu();
+	system("cls");
+	if((fp1=fopen("学生人数.txt","r"))==NULL)
+	{ 
+	printf("文件冇得办法打开");
+	exit(0);
+    }   
+	fscanf(fp1,"%d",&k);
+	fclose(fp1);
+	max=s[0].score;
+	min=s[0].score;
+	for(int i=1;i<k;i++)
+	{
+		if(s[i].score>max)
+		max=s[i].score;
+		if(s[i].score<min)
+		min=s[i].score;
+	}
+	printf("当前最高分：%.1f\n当前最低分：%.1f\n",max,min);
+	return 0;
+	
+}
+
+int average()//平均分 
+{
+	FILE *fp1;
+	system("cls");
+	wenjiandiaochu();
+	float k,c,sum=0;
+		if((fp1=fopen("学生人数.txt","r"))==NULL)
+	{ 
+	printf("文件冇得办法打开");
+	exit(0);
+    }   
+	fscanf(fp1,"%f",&k);
+	fclose(fp1);
+		for(int i=1;i<k;i++)
+	{
+		sum=sum+s[i].score;
+	}
+	c=sum/k;
+	printf("当前学生C语言成绩的平均分为：%.2f\n",c);
+	return 0;
+	
+}
+
+int pass()//及格率 
+{
+	FILE *fp1;
+	system("cls");
+	wenjiandiaochu();
+	float k,c,p=0;
+	int i; 
+		if((fp1=fopen("学生人数.txt","r"))==NULL)
+	{ 
+	printf("文件冇得办法打开");
+	exit(0);
+    }   
+	fscanf(fp1,"%f",&k);
+	fclose(fp1);
+	for(i=0;i<k;i++)
+	{
+		if(s[i].score>=60)
+		       p++;
+	}
+	c=p/k;
+	printf("当前学生C语言成绩的及格率为：%.2f\n",c);
+	return 0;
+	
+}
+
+int mima()//密码设置 
+{
+	char m[10],c; 
+ 	int i;
+ 	printf("\n\n\n\n\t\t\t\t请输入8位数字管理员密码:\n"); 
+ 	for(i=0;i<8;i++)
+ 	{
+  		m[i]=getch();
+  		printf("$");
+ 	}
+ 	c=getchar();//接收回车符 
+ 	m[i]='\0';//用空格做结束标记，使后面的i+n作废 
+ 	printf("\n");
+ 	if(strcmp(m,"14789632")==0)
+ 	return 0;
+ 	if(strcmp(m,"14789632")!=0)
+ 	{
+ 	printf("密码不对呀！你怕四记错了哦！响一哈再输入一次：\n");
+ 		for(i=0;i<8;i++)
+ 	{
+  		m[i]=getch();
+  		printf("$");
+ 	}
+ 	c=getchar();//接收回车符 
+ 	m[i]='\0';//用空格做结束标记，使后面的i+n作废 
+ 	printf("\n");
+ 	if(strcmp(m,"14789632")==0)
+ 	return 0;
+ 	else
+ 	{
+ 	printf("密码错误，系统退出\n");	
+ 	return 1; 
+ 	}
+ 	return 0;
+    }
+ }
+ 
+