问题描述
- 新手 c++学生管理系统 不知道怎么改错
-
#include "iostream"
#include "string"
#include "fstream"
#include "conio.h"
using namespace std;// *******建立学生信息的类
class Student
{
public:
Student *Head,*p;
Student *Next,*end;
char name[20];
char sex;char dorm[20];
char num[20];
int age;
double math;
double english;
double cprogram;
double sum;
double average;void Menu();
void Find();
void Save();
void Modify();
void Delect();
void Display();
void Displaym();
void Input();
void Read(istream &in);
void Add();private:
ifstream in; ofstream out; Student *Findname(char name) { for(Student *p=Head;p->Next!=end;p=p->Next) if(!strcmp(p->Next->name,name)) { return p; } return NULL; } Student *Findnum(int num) { for(Student * p=Head;p->Next!=end;p=p->Next) if(!strcmp(p->Next->num,num)) { return p; } return NULL; }}stu;
void Student::Display() // 输出学生信息
{cout<<"学号:"<
}
void Student::Input() // 输入学生信息
{
system("color 9e");
cout
cin>>stu.num;
cout<
cout
cin>>stu.name;
cout<
cout
cin>>stu.sex;
cout<
cout
cin>>stu.age;
cout<
cout
cin>>stu.dorm;
cout<
cout
cout
cin>>stu.math;
cout<
cout
cin>>stu.english;
cout<
cout
cin>>stu.cprogram;
cout<<endl;
cout<<"信息输入成功!"<<endl;
stu.sum=stu.math+stu.english+stu.cprogram;
stu.average=stu.sum/3;}
void Student::Read(istream &in)// 从文件中读取信息
{
in>>"学号:">>stu.num>>"n"<<"姓名:">>stu.name>>"n">>"性别:">>stu.sex>>"n">>"年龄:">>stu.age>>"n">>"寝室地址:">>stu.dorm>>"n">>"高数成绩:">>stu.math>>"n">>"英语成绩:">>stu.english>>"n">>"C++成绩:">>stu.cprogram>>"n">>"总分:">>stu.sum>>"n">>"平均分:">>stu.average;
}void Student::Add() //写入文件
{//p->Next=new Student; //p=p->Next; ofstream outfile("student.txt"); p->Input(); outfile<<"学号:"<<p->num<<"n"<<"姓名："<<p->name<<"n"<<"性别:"<<p->sex<<"n"<<"年龄:"<<p->age<<"n"<<"寝室地址:"<<p->dorm<<"n"<<"高数成绩:"<<p->math<<"n"<<"英语成绩:"<<p->english<<"n"<<"C++成绩:"<<p->cprogram<<"n"<<"总分:"<<p->sum<<"n"<<"平均分:"<<p->average<<"n"<<endl; outfile<<"-------------------------------------------------------------------"<<endl; outfile.close(); p->Next=new Student; p=p->Next; cout<<"添加成功!"<<endl;}
void Student::Displaym()
{
ifstream infile("student.txt");
//Student *p=Head->Next;p!=p;p=p->Nextfor(Student *p=Head->Next;p!=p;p=p->Next) { //infile.read((char *)p,sizeof(p)); p->Display(); } infile.close();}
// ********查找函数
void Student::Find()
{
char name[20],num[20];
int n;
Student p;
cout<<"ntt********************************n";
cout<<"tt※ 1.按学生的姓名查找ntt※ 2.按学生学号查找";
cout<<"ntt*********************************n请选择：";
cin>>n;
switch(n)
{
case 1:
{
cout<<"输入要查询的学生姓名";
cin>>name;
if(p=Findname(name))
{
p->Next->Display();} else { cout<<"tt没有找到该姓名的学生！"<<'n'<<endl; } break; } case 2: { cout<<"请输入要查询学生的学号"; cin>>num; if(p=Findnum(num)) { p->Next->Display(); } else { cout<<"tt没有找到该学号的学生！"<<'n'<<endl; } }break; }}
// *********修改函数void Student::Modify()
{
char name[20],num;
Student * p;
int n;
cout<<"ntt*********************************n";
cout<<"tt※ 1.按学生的姓名查找修改ntt※ 2.按学生学号查找修改";
cout<<"ntt*********************************n请选择：";
cin>>n;
switch(n)
{
case 1:
{cout<<"tt请输入要修改的人的姓名:";cin>>name; if(p=Findname(name)) { cout<<"tt已找到学生的信息，请输入新的信息!"<<endl; p->Next->Input(); cout<<"修改成功！"<<endl; } else { cout<<"tt没有找到!"<<endl; } } break; case 2: { cout<<"tt请输入要修改的人的学号:";cin>>num; if(p=Findnum(num)) { cout<<"tt已找到学生的信息，请输入新的信息!"<<endl; p->Next->Input(); cout<<"修改成功！"<<endl; } else { cout<<"tt没有找到!"<<endl; } break; } }}
//删除函数
void Student::Delect()
{
int num[20];
Student *p,*temp;
char n;
cout<<"输入需要删除的学生学号";
cin>>num;
if(p=Findnum(num))
{
p->Next->Display();
cout<<"是否删除该学生信息？（y/n）";
cin>>n;
if(n=='y'||n=='Y')
{
temp=p->Next;
p->Next=p->Next->Next;
delete temp;
cout<<"tt删除成功!"<<endl;} else { cout<<"输入任意字符！继续……"; getch(); } } else { cout<<"tt无该生信息!"<<endl; }}
// 保存函数
void Student::Save()
{out.open("student.txt",ios::app); for(Student *p=Head->Next;p!=p;p=p->Next) { out<<"学号:"<<p->num<<"n"<<"姓名："<<p->name<<"n"<<"性别:"<<p->sex<<"n"<<"年龄:"<<p->age<<"n"<<"寝室地址:"<<p->dorm<<"n"<<"高数成绩:"<<p->math<<"n"<<"英语成绩:"<<p->english<<"n"<<"C++成绩:"<<p->cprogram<<"n"<<"总分:"<<p->sum<<"n"<<"平均分:"<<p->average<<"n"<<endl; } out.close();}
//显示函数
void Student::Displaym()
{
ifstream infile("student.txt");
for(Student *p=stu.Head->Next;p!=p;p=p->Next)
{
//infile.read((char *)p,sizeof(p));p->Display();
} infile.close();// ********查找函数
void Student::Find()
{
char name[20],num[20];
int n;
Student p;
cout<<"ntt********************************n";
cout<<"tt※ 1.按学生的姓名查找ntt※ 2.按学生学号查找";
cout<<"ntt*********************************n请选择：";
cin>>n;
switch(n)
{
case 1:
{
cout<<"输入要查询的学生姓名";
cin>>name;
if(p=Findname(name))
{
p->Next->Display();} else { cout<<"tt没有找到该姓名的学生！"<<'n'<<endl; } break; } case 2: { cout<<"请输入要查询学生的学号"; cin>>num; if(p=Findnum(num)) { p->Next->Display(); } else { cout<<"tt没有找到该学号的学生！"<<'n'<<endl; } }break; }}
// *********修改函数void Student::Modify()
{
char name[20],num;
Student * p;
int n;
cout<<"ntt*********************************n";
cout<<"tt※ 1.按学生的姓名查找修改ntt※ 2.按学生学号查找修改";
cout<<"ntt*********************************n请选择：";
cin>>n;
switch(n)
{
case 1:
{cout<<"tt请输入要修改的人的姓名:";cin>>name; if(p=Findname(name)) { cout<<"tt已找到学生的信息，请输入新的信息!"<<endl; p->Next->Input(); cout<<"修改成功！"<<endl; else { cout<<"tt没有找到!"<<endl; } } break; case 2: { cout<<"tt请输入要修改的人的学号:";cin>>num; if(p=Findname(name)) { cout<<"tt已找到学生的信息，请输入新的信息!"<<endl; p->Next->Input(); cout<<"修改成功！"<<endl; } else { cout<<"tt没有找到!"<<endl; } break; } }}
//删除函数
void Student::Delect()
{
char num[20];
Student *p,*temp;
int n;
cout<<"输入需要删除的学生学号";
cin>>num;
if(p=Findnum(num))
{
p->Next->Disendlay();
cout<<"是否删除该学生信息？（1/0）";
cin>>n;
if(n==1)
{
temp=p->Next;
p->Next=p->Next->Next;
delete temp;
cout<<"tt删除成功!"<<endl;} else { cout<<"输入任意字符！继续……"; getch(); } } else { cout<<"tt无该生信息!"<<endl; }}
// 保存函数
void Student::Save()
{out.open("student.txt",ios::app); for(Student *p=Head->Next;p!=p;p=p->Next) { out<<"学号:"<<p->num<<"n"<<"姓名："<<p->name<<"n"<<"性别:"<<p->sex<<"n"<<"年龄:"<<p->age<<"n"<<"寝室地址:"<<p->dorm<<"n"<<"高数成绩:"<<p->math<<"n"<<"英语成绩:"<<p->english<<"n"<<"C++成绩:"<<p->cprogram<<"n"<<"总分:"<<p->sum<<"n"<<"平均分:"<<p->average<<"n"<<endl; } out.close();}
int main()
{int i,j; system("color 8e"); cout<<"********************************************************************************"<<endl; cout<<"****************************欢迎使用学生信息管理系统****************************"<<endl; cout<<"********************************************************************************"<<endl; cout<<"t1.输入信息 t2.保存信息 t3.查询信息 t4.修改并保存"<<endl; cout<<"t5.显示全部 t6.删除信息 t7.退出系统 "<<endl; cout<<"********************************************************************************"<<endl; do { cout<<"请输入您要进行的操作编号(1--7):"; cin>>j; cout<<endl; if(j<1||j>7) cout<<"对不起,请输入1-7这几个选择数字!"<<endl; } while(j<1||j>7); switch(j) { case 1:stu.Add(); break; case 2:stu.Save(); break; case 3:stu.Find(); break; break; case 4:stu.Modify(); case 5:stu.Displaym(); break; case 6:stu.Delect(); break; case 7:exit(0); break; }}
解决方案
D:MyProjects管理student.cpp(42) : error C2664: 'strcmp' : cannot convert parameter 2 from 'char' to 'const char *'
Conversion from integral type to pointer type requires reinterpret_cast, C-style cast or function-style cast
D:MyProjects管理student.cpp(51) : error C2664: 'strcmp' : cannot convert parameter 2 from 'int' to 'const char *'
Conversion from integral type to pointer type requires reinterpret_cast, C-style cast or function-style cast
D:MyProjects管理student.cpp(65) : error C2297: '<<' : illegal, right operand has type 'char [2]'
D:MyProjects管理student.cpp(102) : error C2676: binary '<<' : 'class std::basic_istream >' does not define this operator or a conversion to a type acceptable to the predefined operator
D:MyProjects管理student.cpp(156) : error C2664: 'Findname' : cannot convert parameter 1 from 'char [20]' to 'char'
This conversion requires a reinterpret_cast, a C-style cast or function-style cast
D:MyProjects管理student.cpp(175) : error C2664: 'Findnum' : cannot convert parameter 1 from 'char [20]' to 'int'
This conversion requires a reinterpret_cast, a C-style cast or function-style cast
D:MyProjects管理student.cpp(207) : error C2664: 'Findname' : cannot convert parameter 1 from 'char [20]' to 'char'
This conversion requires a reinterpret_cast, a C-style cast or function-style cast
D:MyProjects管理student.cpp(251) : error C2679: binary '>>' : no operator defined which takes a right-hand operand of type 'int [20]' (or there is no acceptable conversion)
D:MyProjects管理student.cpp(252) : error C2664: 'Findnum' : cannot convert parameter 1 from 'int [20]' to 'int'
This conversion requires a reinterpret_cast, a C-style cast or function-style cast
D:MyProjects管理student.cpp(295) : error C2084: function 'void __thiscall Student::Displaym(void)' already has a body
D:MyProjects管理student.cpp(307) : error C2601: 'Find' : local function definitions are illegal
D:MyProjects管理student.cpp(359) : error C2601: 'Modify' : local function definitions are illegal
D:MyProjects管理student.cpp(495) : fatal error C1075: end of file found before the left brace '{' at 'D:MyProjects管理student.cpp(359)' was matched
解决方案二：
哎 问题很大啊， 要好好看看书，调试你的代码