C
20170728
1、实现动态数组添加学生完成以下功能：添加一个学生，查看数组大小，得到某一下标的学员，查看所有成员。
首先看一下工程目录的结构
[root@localhost Kshine]# tree student
student
├── bin
│ └── main
├── include
│ ├── includes.h
│ ├── stucontrol.h
│ ├── student.h
│ ├── stuview.h
│ └── welcome.h
├── obj
└── src
├── main.c
├── stucontrol.c
├── student.c
├── stuview.c
└── welcome.c
编译命令
gcc src/*.c -o bin/main -Wall -I include/
关键代码
- main.c
#include \"includes.h\"
int main(void)
{
display_welcome(gImage);
// Stu stuNum[200];//定义结构提数组i
Stu *p_stu=(Stu*)malloc(1*sizeof(Stu));
memset(p_stu,0,1*sizeof(Stu));//初始化
main_menu_control(p_stu);
return 0;
}
- stucontrol.c
#include \"stucontrol.h\"
#include <stdio.h>
#include \"stuview.h\"
#include <unistd.h>
#include <stdlib.h>
void main_menu_control(Stu* stu)//主菜单控制层
{
int choose = 0;//定义变量接受选择的选项
while(1)
{
sleep(1); //500*1ms
system(\"clear\"); //清屏
main_menu(); //显示主界面
printf(\"请输入您的选择:\");
scanf(\"%d\",&choose);//赋值
if(getchar() != \'\\n\')
{
printf(\"输入错误，请重新输入!\\n\");
continue;
}
switch(choose)
{
case 1://登录
break;
case 2://注册
stu=regist_student(stu);
break;
case 3://查询单个学生信息
break;
case 4://删除学生
break;
case 5://更新学生成绩
break;
case 6://对成绩进行排序
break;
case 7://查看所有学生
print_all_student_message(stu);
break;
case 0://退出
return;
default:
printf(\"error!\\n\");
break;
}
}
}
- student.c
#include \"includes.h\"
int length = 0;//用来接受注册的实际人数
//注册
Stu* regist_student(Stu* stu)//用户注册函数
{
int i = 0;
// if(length > 200)
// {
// printf(\"服务器爆满，请换服!\\n\");
// return;
// }
Stu data;//定义结构体变量来接受输入的账户名跟密码
memset(&data,0,sizeof(Stu));//初始化
char passwd[20] = \"\";
printf(\"请输入用户名:\");
scanf(\"%s\",data.name);
//查重
for(i = 0; i < length; ++i)
{
if(0 == strcmp(data.name,(stu+i)->name))//查看是否数组里面已经存在相同用户名
{
printf(\"该用户名已被注册，注册失败!\\n\");
return stu;
}
}
printf(\"请输入密码:\");
scanf(\"%s\",data.password);//赋值
printf(\"请再次输入密码:\");
scanf(\"%s\",passwd);
if(0 == strcmp(data.password,passwd))
{
printf(\"注册成功!\\n\");
data.id = length+1; //这边的id，可以复杂化
stu[length++] = data;//将输入的data插入进数组
Stu *p=(Stu*)realloc(stu,(length+1)*sizeof(Stu));
return p;
}
printf(\"两次密码不一致，注册失败!\\n\");
return stu;
}
void print_all_student_message(Stu* stu)//查看所有学生信息
{
int i = 0;
printf(\"id\\t姓名\\t成绩\\t密码\\n\");
printf(\"-------------------------------------\\n\");
for(i = 0; i < length; ++i)
{
printf(\"%d\\t%s\\t%.2f\\t%s\\n\",(stu+i)->id,(stu+i)->name,\\
(stu+i)->score,(stu+i)->password);
printf(\"-------------------------------------\\n\");
}
}
- stuview.c
#include \"stuview.h\"
#include <stdio.h>
void main_menu(void)
{
printf(\"1.登录\\n\");
printf(\"2.注册\\n\");
printf(\"3.查询单个学生信息\\n\");
printf(\"4.删除学生\\n\");
printf(\"5.更新学生成绩\\n\");
printf(\"6.对成绩排序\\n\");
printf(\"7.查看所有学生信息\\n\");
printf(\"0.退出系统\\n\");
}
- welcome.c
#include\"includes.h\"
void display_welcome(unsigned char *gImage)
{
int i=0,j=0;
unsigned char *p=gImage;
int hg=32,wd=97,bs=1;
int tem=154;
system(\"clear\");
for(i=0;i<hg;)
{
for(j=0;j<wd;j++)
{
if(*p>=tem)printf(\" \");
else printf(\"\\033[44;37m#\\033[0m\");//printf(“\\033[40;37msomthe here\\n\\033[0m”);
p++;
}
usleep(20000);
i+=bs;
p=gImage+i*wd;
printf(\"\\n\");
}
p=gImage;
return;
}
/*
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@@@@@@@@@@@@@@@@@@@@@@@@
@@@@@@@@@@@@@@@@
@@@@@@@@@@
@@@@@
@@
@
*/
unsigned char gImage[3104] = { /* 0X08,0X08,0X61,0X00,0X20,0X00, */
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};
- includes.h
#ifndef _INC_H_
#define _INC_H_
#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#include<unistd.h>
#include\"student.h\"
#include\"stucontrol.h\"
#include\"stuview.h\"
#include\"welcome.h\"
#endif
- stucontrol.h
#ifndef _STUCONTROL_H_
#define _STUCONTROL_H_
#include \"student.h\"
void main_menu_control(Stu* stu);//主菜单控制层
#endif
- student.h
//防止头文件重复定义
#ifndef _STUDENT_H_
#define _STUDENT_H_
typedef struct student{
int id;
char name[20];
float score;
char password[20];
}Stu;
Stu* regist_student(Stu* stu);//用户注册函数
void print_all_student_message(Stu* stu);//查看所有学生信息
#endif
- stuview.h
#ifndef _STUVIEW_H_
#define _STUVIEW_H_
void main_menu(void);//菜单函数声明
#endif
- welcome.h
#ifndef WEL_H_
#define WEL_H_
void display_welcome(unsigned char *gImage);
unsigned char gImage[3104];
#endif
运行结果
################ ################ ################ ############## ####### ####
################# ################ ################ ############## ######## ###
################# ################ ################ ############## ######## ###
################# ###### ######## ################ ############## ######### ###
################ ###### ####### ################ ############## #############
######### ##### ###### ######### ######### #############
######### ##### ##### ######### ######### ############
######### ##### ##### ######### ######### ############
######### ##### #### ######### ############## ###########
######### ##### ##### ######### ############## ############
######### ##### # ### ######### ############## ############
######### ##### #### ######### ############## #############
######### ##### ##### ######### ######### #############
######### ##### ###### ######### ######### ##############
######### ##### ####### ######### ######### #### #########
################# ###### ######## ######### ############## #### #########
################# ###### ######### ######### ############## #### #########
################# ################ ######### ############## #### #########
################# ################ ######### ############## #### ##########
# # ##### # # #
### ## ### # ## #####
# #### # # # ### # #
#### # #### ### # # #
## # # #### ### ## # ##
# #### # # # # ##
/*--------------------------------------------------*/
1.登录
2.注册
3.查询单个学生信息
4.删除学生
5.更新学生成绩
6.对成绩排序
7.查看所有学生信息
0.退出系统
请输入您的选择:
2、函数功能模块化+冒泡排序
/*---------------------------------------------
使用堆内存分配一个5个元素的一维数组(malloc)，
从键盘输入5个元素进行初始化，实现冒泡排序
并输出，数组的初始化、排序、输出都要求分函数写
----------------------------------------------*/
#include<stdio.h>
//#include<malloc.h>
#include<stdlib.h>
/*------@函数原型声明------------------------*/
void in(int *p,int n); //输入
void sort(int *p,int n); //排序
void out(int *p,int n); //输出
/*------@主函数-----------------------------*/
int main()
{
int *p=(int*)malloc(5*sizeof(int));
printf(\"请输入5个整数\\n\");
in(p,5);
printf(\"原数组是 ：\");
out(p,5);
sort(p,5);
printf(\"冒泡排序后：\");
out(p,5);
return 0;
}
/*-------@输出函数定义-----------------------*/
void out(int *p,int n)
{
int i;
for(i=0;i<n;i++)
{
printf(\"%d \",*(p+i));
}
printf(\"\\n---------------------\\n\");
}
/*------@输入函数定义------------------------*/
void in(int *p,int n)
{
int i;
for(i=0;i<n;i++)
{
printf(\"请输入第%d个数：\",i+1);
scanf(\"%d\",(p+i));
}
}
/*------@冒泡排序---------------------------*/
void sort(int *p,int n)
{
int i,j;
for(i=0;i<n-1;i++)
{
for(j=0;j<n-1-i;j++)
{
if(*(p+j)>*(p+j+1))
{
int tem=*(p+j);
*(p+j)=*(p+j+1);
*(p+j+1)=tem;
}
}
}
}
运行结果
[root@localhost Kshine]# gcc test32.c
[root@localhost Kshine]# ./a.out
请输入5个整数
请输入第1个数：23
请输入第2个数：13
请输入第3个数：45
请输入第4个数：3
请输入第5个数：57
原数组是 ：23 13 45 3 57
---------------------
冒泡排序后：3 13 23 45 57
---------------------
3、先排序，后去除最大的两个数和最小的两个数，再求和和均值
#include<stdio.h>
//#include<malloc.h>
#include<stdlib.h>
void out(int *p,int n)
{
int i;
for(i=0;i<n;i++)
{
printf(\"%d \",*(p+i));
}
printf(\"\\n---------------------\\n\");
}
void in(int *p,int n)
{
int i;
for(i=0;i<n;i++)
scanf(\"%d\",(p+i));
}
void sort(int *p,int n)
{
int i,j;
for(i=0;i<n-1;i++)
{
for(j=0;j<n-1-i;j++)
{
if(*(p+j)>*(p+j+1))
{
int tem=*(p+j);
*(p+j)=*(p+j+1);
*(p+j+1)=tem;
}
}
}
}
int main()
{
/*向系统申请 10*4个字节的内存块 */
int *p=(int*)malloc(10*sizeof(int));
if(p==NULL)
{
printf(\"malloc error\\n\");
exit(1);
}
//输入10个数字(相当于进行赋值初始化)
printf(\" 请输入10个整数:----------\\n\");
int i=0;
for(i=0;i<10;i++)
{
printf(\"请输入第%d个数\",i+1);
scanf(\"%d\",(p+i));
}
//原数组
printf(\"原数组是：----------------\\n\");
out(p,10);
printf(\"排序后是：----------------\\n\");
sort(p,10);
out(p,10);
printf(\"去掉最大和最小的两个数后--\\n\");
//缩小内存块
// free(p);
// p=p+2;
// p=(int*)realloc(p,6*sizeof(int));
out(p+2,6);
float sum=0;
float ave=0;
for(i=0;i<6;i++)
{
sum+=*(p+2+i);
}
ave=sum/6;
printf(\"和是 %f , 均值是 %f \\n\",sum,ave);
/*释放资源*/
free(p);
//p是野指针
p=NULL;
return 0;
}
运行结果
[root@localhost Kshine]# gcc test31.c
[root@localhost Kshine]# ./a.out
请输入10个整数:----------
请输入第1个数13
请输入第2个数34
请输入第3个数54
请输入第4个数2
请输入第5个数34
请输入第6个数65
请输入第7个数13
请输入第8个数24
请输入第9个数74
请输入第10个数23
原数组是：----------------
13 34 54 2 34 65 13 24 74 23
---------------------
排序后是：----------------
2 13 13 23 24 34 34 54 65 74
---------------------
去掉最大和最小的两个数后--
13 23 24 34 34 54
---------------------
和是 182.000000 , 均值是 30.333334
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