C语言高手请进!!!
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大学1年级C语言程序实践题:
一.学生管理系统,要求将学生的学号.姓名.性别.成绩以二叉树或动态链表存放在studio,txt文件中.通过以下拉菜单完成以下功能:
1.插入学生成绩
2.一定条件修改某些学生成绩
3.一定条件删除某些学生成绩
4.条件查询和模糊查询
5.将学生消息按成绩降序排列 放在studio,txt文件中
6.按不同分数段统计学生数,以饼图显现
二.扑克牌排序
从54张中选10张,背面朝上,然后逐一掀开,按数字大小排列.
数字相同时:黑桃>红桃>梅花>方片
用气泡法或选择法排序,并且动态显示排序过程
三.图书馆管理系统,要求实现用户(师生)与图书的基本消息管理与借还操作
我自己已经写出程序来了,并且已经交了(就是有点太复杂不实用),但是我想知道什么是更好最好的答案
#include<fstream>
#include<string>
#include <iomanip>
#include<windows.h>
#include<ctime>
using namespace std;
const int NAME_NUM=30;
struct student
char name[NAME_NUM];
float num;
float chinaNum;
float englishNum;
float mathNum;
float average;
float result;
int pos;
student *next;
;
void Print(student *head);
void InsertFront(student* &head, student *pNew);
void InsertRear(student* &head, student *pNew);
student* Find(student *head, char *findStr, char type);
student* Read();
void Write(student* head);
void ShowList(student* head);
int GetLength(student* head);
void Delete(student* &head, char *delStr,int delNum);
void FindMaxOrMin(student *head,char type,char maxOrMin);
void Reword(student *pStd);
void Sort(student *&head, char type,char maxOrMin);
void Count(student *&head);
void DeleteAll(student *&head);
bool Enter(char type);
void SetTitle(bool isLoad);
void AboutMe();
void ChaXun(string str,student *head);
void PaiMing(string str, student* head);
void ShanChu(string str, student *&head);
void XianShi(string str, student *head);
void XuiGai(string str, student *&head);
void ZengJia(string str, student* &head);
int Run();
bool Enter(char type)
ofstream out("Password.pwd",ios::app);
ifstream in("Password.pwd");
string s[2];
int num=0;
string zhangHao;
string miMa;
while(!in.eof())
in>>s[num];
num++;
if(num==2)
break;
if(s[0].compare("")==0 || type=='2' )
if(s[0].compare("")==0 && type!='2')
cout<<"你是第一次使用本程序,请设置帐号和密码."<<endl;
else
bool isLoad=false;
isLoad=Enter('1');
if(isLoad==true)
cout<<"修改用户."<<endl;
out.close();
out.open("Password.pwd",ios::trunc);
else
cout<<"你输入的密码错误."<<endl;
cout<<"你不是管理员不能修改密码."<<endl;
return false;
cout<<"请输入您的新帐号: ";
cin>>s[0];
cout<<"请输入您的新密码: ";
cin>>s[1];
string s1,s2;
for(int i=0; i<s[0].size(); i++)
s1+=char(int(s[0][i])+11);
for( i=0; i<s[1].size(); i++)
s2+=char(int(s[1][i])+11);
s[0]=s1;
s[1]=s2;
for( i=0; i<=1; i++)
out<<s[i]<<" ";
out.close();
string s1,s2;
for(int i=0; i<s[0].size(); i++)
s1+=char(int(s[0][i])-11);
for( i=0; i<s[1].size(); i++)
s2+=char(int(s[1][i])-11);
cout<<"请输入您的帐号: ";
cin>>zhangHao;
cout<<"请输入您的密码: ";
cin>>miMa;
if(zhangHao.compare(s1)==0 && miMa.compare(s2)==0)
return true;
else
return false;
return false;
void Print(student *head)
student *pHead=head;
int num=strlen(head->name);
while(head)
if(num<strlen(head->name))
num=strlen(head->name);
head=head->next;
head=pHead;
cout<<setw(num)<<head->name<<setw(8)
<<head->num<<setw(10)<<head->chinaNum
<<setw(10)<<head->mathNum<<setw(10)
<<head->englishNum<<setw(8)<<head->result
<<setw(8)<<head->average<<setw(5)<<head->pos<<endl;
void ShowList(student* head)
cout<<"姓名:"<<setw(8)<<"座号:"<<setw(10)
<<"语文分数:"<<setw(10) <<"数学分数:"
<<setw(10)<<"英语分数:"<<setw(8)<<"总分数:"
<<setw(8)<<"平均分:"<<setw(6)<<"名次:"<<endl<<endl;
while(head)
Count(head);
Print(head);
head=head->next;
cout<<endl;
void Write(student* head)
ofstream out("Student.dat",ios::trunc);
while(head)
Count(head);
out.write((char*)head,sizeof(student));
head=head->next;
out.close();
student* Read()
ifstream in("Student.dat");
student *head;
student *pP;
student *pEnd;
pP=new student;
pEnd=head=pP;
student *pS=new student;
memset(pS->name,0,NAME_NUM);
in.read((char*)pS,sizeof(student));
if(strcmp(pS->name,"\0")==0)
return NULL;
strcpy(pP->name,pS->name);
pP->num=pS->num;
pP->chinaNum=pS->chinaNum;
pP->englishNum=pS->englishNum;
pP->mathNum=pS->mathNum;
while(!in.eof())
in.read((char*)pS,sizeof(student));
pEnd->next=pP;
pEnd=pP;
pP=new student;
strcpy(pP->name,pS->name);
pP->num=pS->num;
pP->chinaNum=pS->chinaNum;
pP->englishNum=pS->englishNum;
pP->mathNum=pS->mathNum;
pEnd->next=NULL;
delete pP;
return head;
student* Find(student *head,char *findStr, char type)
/*参数说明:
type=='1' 按 名字 查找
type=='2' 按 座号 查找
type=='3' 按 语文 查找
type=='4' 按 数学 查找
type=='5' 按 英语 查找
type=='6' 按 总分 查找
type=='7' 按 平均分 查找
type=='8' 按 排名 查找 //没有实现
*/
bool isFind=false;
student *firstStd=NULL;
cout<<"姓名:"<<setw(8)<<"座号:"<<setw(10)
<<"语文分数:"<<setw(10) <<"数学分数:"
<<setw(10)<<"英语分数:"<<setw(8)<<"总分数:"
<<setw(8)<<"平均分:"<<setw(5)<<"名次:"<<endl<<endl;
while(head)
if(type=='1')
if(strcmp(head->name,findStr)==0)
if(firstStd==NULL)
firstStd=head;
Print(head);
isFind=true;
if(head->next==NULL)
return firstStd;
else if(type=='2')
if(int(head->num)==int(atof(findStr)))
if(firstStd==NULL)
firstStd=head;
Print(head);
isFind=true;
if(head->next==NULL)
return firstStd;
else if(type=='3')
if(int(head->chinaNum)==int(atof(findStr)))
if(firstStd==NULL)
firstStd=head;
Print(head);
isFind=true;
if(head->next==NULL)
return firstStd;
else if(type=='4')
if(int(head->mathNum)==int(atof(findStr)))
if(firstStd==NULL)
firstStd=head;
Print(head);
isFind=true;
if(head->next==NULL)
return firstStd;
else if(type=='5')
if(int(head->englishNum)==int(atof(findStr)))
if(firstStd==NULL)
firstStd=head;
Print(head);
isFind=true;
if(head->next==NULL)
return firstStd;
else if(type=='6')
if(int(head->result)==int(atof(findStr)))
if(firstStd==NULL)
firstStd=head;
Print(head);
isFind=true;
if(head->next==NULL)
return firstStd;
else if(type=='7')
if(int(head->average)==int(atof(findStr)))
if(firstStd==NULL)
firstStd=head;
Print(head);
isFind=true;
if(head->next==NULL)
return firstStd;
else if(type=='8')
if(int(head->pos)==int(atof(findStr)))
if(firstStd==NULL)
firstStd=head;
Print(head);
isFind=true;
if(head->next==NULL)
return firstStd;
head=head->next;
if(isFind==false)
cout<<"找不到你要找的记录."<<endl;
return NULL;
return firstStd;
void InsertRear(student* &head,student *pNew)
student *pEnd,*pHead,*pS=new student;
if(head==NULL)
InsertFront(head,pNew);
return ;
pHead=head;
while(head)
pEnd=head;
if(head->next==NULL)
break;
head=head->next;
strcpy(pS->name,pNew->name);
pS->num=pNew->num;
pS->chinaNum=pNew->chinaNum;
pS->englishNum=pNew->englishNum;
pS->mathNum=pNew->mathNum;
pS->next=NULL;
pEnd->next=pS;
head=pHead;
void InsertFront(student* &head, student *pNew)
student *pHead=new student;
strcpy(pHead->name,pNew->name);
pHead->num=pNew->num;
pHead->chinaNum=pNew->chinaNum;
pHead->englishNum=pNew->englishNum;
pHead->mathNum=pNew->mathNum;
pHead->next=head;
head=pHead;
int GetLength(student *head)
int len=0;
while(head)
len++;
head=head->next;
return len;
void Delete(student* &head, char *delStr,int delNum)
student* pDel,*pNew,*pHead;
bool isFind=false;
pHead=head;
if(strcmp(head->name,delStr)==0)
pNew=head->next;
delete head;
head=pNew;
if(delNum==2)
cout<<endl<<"因为要删除的记录在前面,所有只删除第一记录."<<endl;
return ;
while(head->next)
if(delNum==2)
if(strcmp(head->next->name,delStr)==0)
pNew=head->next->next;
pDel=head->next;
delete pDel;
head->next=pNew;
head=pHead;
isFind=true;
else
if(strcmp(head->next->name,delStr)==0)
pNew=head->next->next;
pDel=head->next;
delete pDel;
head->next=pNew;
head=pHead;
return ;
head=head->next;
head=pHead;
if(isFind==false)
cout<<"找不到你要删除的记录."<<endl;
else
cout<<"删除记录成功."<<endl;
void FindMaxOrMin(student *head,char type,char maxOrMin)
/*参数说明:
type=='1' 按 语文 查找
type=='2' 按 数学 查找
type=='3' 按 英语 查找
type=='4' 按 总分 查找
type=='5' 按 平均分 查找
type=='6' 按 排名 查找
*/
int maxNum;
student *pHead=head;
if(type=='1')
maxNum=int(head->chinaNum);
else if (type=='2')
maxNum=int(head->mathNum);
else if (type=='3')
maxNum=int(head->englishNum);
else if (type=='4')
maxNum=int(head->result);
else if (type=='5')
maxNum=int(head->average);
else if (type=='6')
maxNum=head->pos;
else
cout<<"你输入错误,请重新输入."<<endl;
return ;
while(head)
if(maxOrMin=='1')
if(type=='1')
if(maxNum<int(head->chinaNum))
maxNum=int(head->chinaNum);
else if (type=='2')
if(maxNum<int(head->mathNum))
maxNum=int(head->mathNum);
else if (type=='3')
if(maxNum<int(head->englishNum))
maxNum=int(head->englishNum);
else if (type=='4')
if(maxNum<int(head->result))
maxNum=int(head->result);
else if (type=='5')
if(maxNum<int(head->average))
maxNum=int(head->average);
else if (type=='6')
if(maxNum<head->pos)
maxNum=head->pos;
else
if(type=='1')
if(maxNum>int(head->chinaNum))
maxNum=int(head->chinaNum);
else if (type=='2')
if(maxNum>int(head->mathNum))
maxNum=int(head->mathNum);
else if (type=='3')
if(maxNum>int(head->englishNum))
maxNum=int(head->englishNum);
else if (type=='4')
if(maxNum>int(head->result))
maxNum=int(head->result);
else if (type=='5')
if(maxNum>int(head->average))
maxNum=int(head->average);
else if (type=='6')
if(maxNum>head->pos)
maxNum=head->pos;
head=head->next;
head=pHead;
cout<<"姓名:"<<setw(8)<<"座号:"<<setw(10)
<<"语文分数:"<<setw(10) <<"数学分数:"
<<setw(10)<<"英语分数:"<<setw(8)<<"总分数:"
<<setw(8)<<"平均分:"<<setw(5)<<"名次:"<<endl<<endl;
while(head)
if(type=='1')
if(int(head->chinaNum)==maxNum)
Print(head);
else if (type=='2')
if(int(head->mathNum)==maxNum)
Print(head);
else if (type=='3')
if(int(head->englishNum)==maxNum)
Print(head);
else if (type=='4')
if(int(head->result)==maxNum)
Print(head);
else if (type=='5')
if(int(head->average)==maxNum)
Print(head);
else if (type=='6')
if(head->pos==maxNum)
Print(head);
head=head->next;
void Reword(student *pStd)
if(pStd!=NULL)
cout<<"请输入学生的新名字:"<<endl;
cin>>pStd->name;
cout<<"请输入学生的座号"<<endl;
cin>>pStd->num;
cout<<"请输入学生的语文分数"<<endl;
cin>>pStd->chinaNum;
cout<<"请输入学生的数学分数"<<endl;
cin>>pStd->mathNum;
cout<<"请输入学生的英语分数"<<endl;
cin>>pStd->englishNum;
else
return ;
void Sort(student *&head, char type,char maxOrMin)
/*参数说明:
type=='1' 按 语文 排列
type=='2' 按 数学 排列
type=='3' 按 英语 排列
type=='4' 按 总分 排列
type=='5' 按 平均分 排列
type=='6' 按 座号 排列
*/
student *pHead,*pH;
pHead=pH=head;
int len=GetLength(head);
float *array=new float[len];
int i;
int x=0;
float num=0;
while(head)
Count(head);
if(type=='1')
num=head->chinaNum;
else if(type=='2')
num=head->mathNum;
else if(type=='3')
num=head->englishNum;
else if(type=='4')
num=head->result;
else if(type=='5')
num=head->average;
else if(type=='6')
num=head->num;
array[x]=num;
x++;
head=head->next;
head=pHead;
if(maxOrMin=='1')
for( i=1; i<len; i++)
for(int j=0; j<len-i; j++)
if(array[j]<array[j+1])
float num;
num=array[j];
array[j]=array[j+1];
array[j+1]=num;
else
for( i=1; i<len; i++)
for(int j=0; j<len-i; j++)
if(array[j]>array[j+1])
float num;
num=array[j];
array[j]=array[j+1];
array[j+1]=num;
int pos=1;
for(i=0; i<len; i++)
head=pHead;
while(head)
if(type=='1')
num=head->chinaNum;
else if(type=='2')
num=head->mathNum;
else if(type=='3')
num=head->englishNum;
else if(type=='4')
num=int(head->result);
else if(type=='5')
num=int(head->average);
else if(type=='6')
num=int(head->num);
int n=0;
if(int(array[i])==int(num))
if(int(array[i])!=int(array[i+1]))
if(n==0)
n=pos;
head->pos=pos;
pos++;
else
head->pos=n;
head=head->next;
head=pH;
delete []array;
void Count(student *&head)
head->result=head->chinaNum+head->englishNum+head->mathNum;
head->average=head->result/3;
void DeleteAll(student* &head)
student *cp,*np;
cp=head;
while(cp)
np=cp->next;
delete cp;
cp=np;
head=NULL;
void ChaXun(string str,student *head)
Sort(head,'4','1');
cout<<"欢迎使用查询功能"<<endl<<endl;
cout<<"请输入你要按什么查询 1->一般查询 2->查找最多 3->查找最少"<<endl;
string s;
cin>>s;
while(s[0]!='1'&&s[0]!='2'&&s[0]!='3')
cout<<"你输入错误,请重新输入."<<endl;
cin>>s;
if(s[0]=='1')
cout<<"按什么查询?"<<endl;
cout<<"1->姓名 2->座号 3->语文成绩 4->数学成绩 "
<<"5->英语成绩 6->总分 7->平均分 8->排名"<<endl;
cin>>str;
while(str[0]!='1' && str[0]!='2' &&
str[0]!='3' && str[0]!='4' &&
str[0]!='5' && str[0]!='6' &&
str[0]!='7' && str[0]!='8' )
cout<<"你输入错误,请重新输入."<<endl;
cin>>str;
char findStr[30];
cout<<"请输入要查找的关键字或关键数:"<<endl;
cin>>findStr;
switch(str[0])
case '1':
Find(head,findStr,'1');
break;
case '2':
Find(head,findStr,'2');
break;
case '3':
Find(head,findStr,'3');
break;
case '4':
Find(head,findStr,'4');
break;
case '5':
Find(head,findStr,'5');
break;
case '6':
Find(head,findStr,'6');
break;
case '7':
Find(head,findStr,'7');
break;
case '8':
Find(head,findStr,'8');
break;
else if(s[0]=='2')
cout<<"请输入要按什么查询?"<<endl;
cout<<"1->语文成绩 2->数学成绩 "
<<"3->英语成绩 4->总分 5->平均分 6->排名"<<endl;
string s;
cin>>s;
switch(s[0])
case '1':
FindMaxOrMin(head,'1','1');
break;
case '2':
FindMaxOrMin(head,'2','1');
break;
case '3':
FindMaxOrMin(head,'3','1');
break;
case '6':
FindMaxOrMin(head,'6','1');
break;
case '5':
FindMaxOrMin(head,'5','1');
break;
default:
FindMaxOrMin(head,'4','1');
break;
else if(s[0]=='3')
cout<<"请输入要按什么查询?"<<endl;
cout<<"1->语文成绩 2->数学成绩 "
<<"3->英语成绩 4->总分 5->平均分 6->排名"<<endl;
string s;
cin>>s;
switch(s[0])
case '1':
FindMaxOrMin(head,'1','2');
break;
case '2':
FindMaxOrMin(head,'2','2');
break;
case '3':
FindMaxOrMin(head,'3','2');
break;
case '6':
FindMaxOrMin(head,'6','2');
break;
case '5':
FindMaxOrMin(head,'5','2');
break;
default:
FindMaxOrMin(head,'4','2');
break;
void ZengJia(string str, student* &head)
student *pNew=new student;
cout<<"欢迎使用增加功能"<<endl<<endl;
cout<<"请输入新学生的名字 :"<<endl;
cin>>pNew->name;
cout<<"请输入新学生的座号 :"<<endl;
cin>>pNew->num;
cout<<"请输入他的语文分数 :"<<endl;
cin>>pNew->chinaNum;
cout<<"请输入他的数学分数"<<endl;
cin>>pNew->mathNum;
cout<<"请输入他的英语分数"<<endl;
cin>>pNew->englishNum;
cout<<"插入记录的 (1->最前面 2->最后面)"<<endl;
cin>>str;
while(str[0]!='1' && str[0]!='2')
cout<<"你输入错误,请重新输入."<<endl;
cout<<"插入记录的 (1->最前面 2->最后面)"<<endl;
cin>>str;
if(str[0]=='1')
InsertFront(head,pNew);
else if(str[0]=='2')
InsertRear(head,pNew);
cout<<"新学生增加成功."<<endl;
void ShanChu(string str, student *&head)
char delStr[30];
cout<<"欢迎使用删除功能"<<endl<<endl;
cout<<"1->查询删除 2->全部删除"<<endl;
cin>>str;
while(str[0]!='1' && str[0]!='2')
cout<<"输入错误,请重新输入."<<endl;
cin>>str;
if(str[0]=='1')
cout<<"请输入要删除的关键字"<<endl;
cin>>delStr;
cout<<"1->删除第一条找到的记录 2->删除所有找到的记录"<<endl;
cin>>str;
while(str[0]!='1'&&str[0]!='2')
cout<<"你输入错误,请重新输入."<<endl;
cin>>str;
cout<<"你真的要删除吗? 1->删除 2->取消"<<endl;
string s;
cin>>s;
if(str[0]=='1')
if(str[0]=='1')
Delete(head,delStr,1);
else
Delete(head,delStr,2);
else
cout<<"你已经取消删除了."<<endl;
else
cout<<"你真的要删除全部数据吗?这样会使你的数据全部丢失哦."<<endl;
cout<<"1->全部删除 2->取消删除"<<endl;
cin>>str;
if(str[0]=='1')
DeleteAll(head);
else
cout<<"你已经取消删除了."<<endl;
void PaiMing(string str, student* head)
string s;
cout<<"欢迎使用排名功能"<<endl<<endl;
cout<<"排名选择: 1->升序 2->降序"<<endl;
cin>>s;
cout<<"请输入要按什么排名?"<<endl;
cout<<"1->语文成绩 2->数学成绩 3->英语成绩 "
<<"4->总分 5->平均分 6->座号"<<endl;
cin>>str;
while(str[0]!='1' && str[0]!='2' &&
str[0]!='3' && str[0]!='4' &&
str[0]!='5' && str[0]!='6' )
cout<<"你输入错误,请重新输入."<<endl;
cin>>str;
cout<<"姓名:"<<setw(8)<<"座号:"<<setw(10)
<<"语文分数:"<<setw(10) <<"数学分数:"
<<setw(10)<<"英语分数:"<<setw(8)<<"总分数:"
<<setw(8)<<"平均分:"<<setw(6)<<"名次:"<<endl<<endl;
if(s[0]=='2')
switch(str[0])
case '1':
Sort(head,'1','1');
break;
case '2':
Sort(head,'2','1');
break;
case '3':
Sort(head,'3','1');
break;
case '4':
Sort(head,'4','1');
break;
case '5' 参考技术A 我不是高手，不过我写过一个学生信息管理的东西，有源代码，
我贴在一个论坛上了。
http://bbs.bc-cn.net/dispbbs.asp?boardid=5&replyid=486453&id=83340&page=1&skin=0&star=1
你可以去看一下，交作业应该可以哈 。。。 参考技术B 课程设计之类的最好自己做,这样才能提高自己的c能力.
做完这几个题目就会发现你会喜欢上c的 参考技术C 我上大一的时候也做过这样的题,很有意思的.
当你做出的时候回感觉自己很有成就感的 ! 参考技术D hehe,我现在也不太会 这些题都在我油箱里，可是我不想给你，因为自己做才会提高~！
C语言高手请进
有一个简单的程序,老是运行不了,也不知道错在哪,请高手指点
main()
int num1,num2,max;
scanf("%d,%d",&num1,&num2);
printf("max=%d\n",max(num1,num2));
int max(int x,int y)
if(x>y) return x;
else return y;
把你们谁改好的程序,发过来,我一看就明白
main函数之外你定义了一个叫max的函数,
会造成编译时二义性.所以不能运行.
(因为在函数中定义的同名变量或函数会覆盖该
函数体外的变量或函数) 参考技术A scanf("%d,%d",&num1,&num2);
把%d,%d中间的逗号取掉.再加上头文件
还有楼下的说:函数申明 参考技术B 函数使用前需要声明。
main()
int num1,num2,max;
int max(int x,int y);
scanf("%d,%d",&num1,&num2);
printf("max=%d\n",max(num1,num2));
int max(int x,int y)
if(x>y) return x;
else return y;
参考技术C int num1,num2,max;//定义函数出错;
改为:
int max(int x,int y);
int int num1,num2;
另外:建议你不要用max这个字符,避免和某些关键字符重复! 参考技术D 在使用函数的时候需要加以声明的，声明应该在使用该函数之前，即在printf("max=%d\n",max(num1,num2));
这句话之前应该有一句
int max(int x,int y);
，或者直接把
int max(int x,int y)
if(x>y) return x;
else return y;
这句写在main函数之前，也就是最上边，已达到声明的效果 第5个回答 2007-09-22 int max(int x,int y)
if(x>y) return x;
else return y;
main()
int num1,num2;
scanf("%d,%d",&num1,&num2);
printf("max=%d\n",max(num1,num2));
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