CString hotel; CString str; hotel+=m_strHId; hotel+=' '; hotel += m_strHName; hotel += ' '; hotel += m_strHCity; hotel += ' '; wchar_t *wText=CStringToWChar(m_strHName); DWORD dwNum = WideCharToMultiByte(CP_OEMCP,NULL,wText,-1,NULL,0,NULL,FALSE); char *psText; psText = new char[dwNum]; WideCharToMultiByte (CP_OEMCP,NULL,wText,-1,psText,dwNum,NULL,FALSE); hotel+=psText; hotel+=' '; wText=CStringToWChar(m_strHCity); dwNum = WideCharToMultiByte(CP_OEMCP,NULL,wText,-1,NULL,0,NULL,FALSE); psText = new char[dwNum]; WideCharToMultiByte (CP_OEMCP,NULL,wText,-1,psText,dwNum,NULL,FALSE); hotel+=psText; hotel+=' '; str.Format(L"%d ",m_iHCount); hotel+=str; str.Format(L"%d ",m_iComCount); hotel+=str; str.Format(L"%d ",m_iComEmpCount); hotel+=str; str.Format(L"%d ",m_iComPrice); hotel+=str; str.Format(L"%d ",m_iSupCount); hotel+=str; str.Format(L"%d ",m_iSupEmpCount); hotel+=str; str.Format(L"%d\n",m_iSupPrice); hotel+=str; delete [] wText; delete [] psText; CStdioFile file; file.Open(_T("hotel.txt"),CFile::modeCreate|CFile::modeNoTruncate||CFile::modeWrite); file.SeekToEnd(); file.WriteString(hotel); file.Close(); MessageBox(L"酒店信息添加成功！",L"提示"); CDialogEx::OnOK(); } } void CAddHotelDlg::OnBnClickedCancel() { CDialogEx::OnCancel(); }为什么信息显示不出来

这段代码的作用class CString { public: CString(const char str) :_str(new char[strlen(str) + 5]) { _str += 4; strcpy(_str, str); GetRefCount() = 1; } CString(const CString&s) :_str(s._str) { ++GetRefCount(); } ~CString() { GetRefCount() -= 1; if (0 == GetRefCount()) { delete[] (_str - 4); } } int &GetRefCount() { return ((int )(_str - 4)); } CString &operator=(const CString &s) { if (_str != s._str) { GetRefCount() -= 1; if (0 == GetRefCount()) { delete[] (_str - 4); } _str = s._str; GetRefCount()++; } return this; } friend ostream &operator<<(ostream &out, const CString &s) { out << s._str; return out; } private: char *_str; };

这段代码定义了一个CString类，它用来表示一个字符串，并提供了两个构造函数。第一个构造函数接受一个const char*类型的参数，用来初始化一个CString对象，它会在堆上分配一块内存，大小为输入参数的长度+5（为了...

#include <iostream> #include <cstring> using namespace std; class CSTRING { public: CSTRING() : ptr(nullptr), len(0) {} CSTRING(const char* str) { len = strlen(str); ptr = new char[len + 1]; strcpy(ptr, str); } CSTRING(const CSTRING& other) { len = other.len; ptr = new char[len + 1]; strcpy(ptr, other.ptr); } ~CSTRING() { if (ptr != nullptr) { delete[] ptr; ptr = nullptr; } } CSTRING& operator=(const CSTRING& rhs) { if (this != &rhs) { if (ptr != nullptr) { delete[] ptr; } len = rhs.len; ptr = new char[len + 1]; strcpy(ptr, rhs.ptr); } return this; } CSTRING operator+(const CSTRING& rhs) const { CSTRING result; result.len = len + rhs.len; result.ptr = new char[result.len + 1]; strcpy(result.ptr, ptr); strcat(result.ptr, rhs.ptr); return result; } CSTRING& operator+=(const CSTRING& rhs) { len += rhs.len; char temp = new char[len + 1]; strcpy(temp, ptr); strcat(temp, rhs.ptr); delete[] ptr; ptr = temp; return this; } char& operator[](int index) { return ptr[index]; } void insert(const char str, int pos) { int str_len = strlen(str); char* temp = new char[len + str_len + 1]; strncpy(temp, ptr, pos); strcpy(temp + pos, str); strcpy(temp + pos + str_len, ptr + pos); delete[] ptr; ptr = temp; len += str_len; } bool operator>(const CSTRING& rhs) const { return strcmp(ptr, rhs.ptr) > 0; } friend ostream& operator<<(ostream& os, const CSTRING& str); friend istream& operator>>(istream& in, const CSTRING& str); private: char* ptr; int len; }; ostream& operator<<(ostream& os, const CSTRING& str) { os <<"--"<<str.ptr; return os; } istream& operator>>(istream& in, const CSTRING& str) { for (int i = 0; i < str.len ; i++) { cin>>str.ptr[i]; } return in; } int main() { int n, i, j; while (cin >> n) { CSTRING *c = new CSTRING[n + 2]; for (i = 0; i < n; i++) { cin >> c[i]; } for (i = 0; i < n - 1; i++) for (j = 0; j < n - i - 1; j++) if (c[j] > c[j + 1]) { c[n] = c[j]; c[j] = c[j + 1]; c[j + 1] = c[n]; } for (i = 0; i < n; i++) c[n + 1] += c[i]; cout << c[n + 1] << endl; delete[] c; } return 0; }帮我调整代码使其能输出--aaa--bbb--ccc

CSTRING& operator+=(const CSTRING& rhs) { len += rhs.len; char* temp = new char[len + 1]; strcpy(temp, ptr); strcat(temp, rhs.ptr); delete[] ptr; ptr = temp; return *this; } char& operator...

CString strText = _T(""); for (int num = 0; num < 7; num++) { CString str_num; str_num.Format(_T("%5d"), C彩票选号器MDlg::y[num]); strText += str_num; } //CString strText = str_nu; CStatic* pStaticText = (CStatic*)GetDlgItem(IDC_STATIC); // 获取静态文本控件指针 pStaticText->SendMessage(WM_SETTEXT, NULL, (LPARAM)(strText));这段代码有什么错误，并改正

strText += str_num; } CStatic* pStaticText = (CStatic*)GetDlgItem(IDC_STATIC); // 获取静态文本控件指针 pStaticText->SendMessage(WM_SETTEXT, NULL, (LPARAM)(strText)); 这样就可以将 strText 的...

#include<iostream> #include<cstring> using namespace std; class CSTRING { private: char p; public: CSTRING() { p = NULL; } CSTRING(const char str) { p = new char[strlen(str) + 1]; strcpy(p, str); } CSTRING(const CSTRING &str) { p = new char[strlen(str.p) + 1]; strcpy(p, str.p); } ~CSTRING() { if (p != NULL) { delete[] p; } } bool operator > (const CSTRING &str) const { return strcmp(p, str.p) > 0; } CSTRING& operator += (const CSTRING &str) { char temp = new char[strlen(p) + strlen(str.p) + 1]; strcpy(temp, p); strcat(temp, str.p); if (p != NULL) { delete[] p; } p = temp; return this; } friend istream& operator >> (istream &in, CSTRING &str) { char temp[100]; in >> temp; str = CSTRING(temp); return in; } friend ostream& operator << (ostream &out, const CSTRING &str) { out << "--" << str.p << "--"; return out; } }; int main() { #ifdef _CRT_SECURE_NO_WARNINGS freopen("./in.txt", "r", stdin); freopen("./out.txt", "w", stdout); #endif int n,i,j; while(cin>>n) { CSTRING *c=new CSTRING[n+2]; for(i=0;i<n;i++) { cin>>c[i]; } for(i=0;i<n-1;i++) for(j=0;j<n-1-i;j++) if(c[j]>c[j+1]) { c[n]=c[j]; c[j]=c[j+1]; c[j+1]=c[n]; } for(i=0;i<n;i++) { c[n+1]+=c[i]; } cout<<c[n+1]<<endl; delete[] c; } return 0; }，优化一下这段代码

CSTRING& operator += (const CSTRING& s) { str += s.str; return *this; } friend istream& operator >> (istream& in, CSTRING& s) { getline(in, s.str); return in; } friend ostream& operator ...

将此文件改为多文件#include<iostream> #include<string.h> using namespace std; class CSTRING { private: char* p; public: CSTRING() { int len = 0; p = new char[len + 1]; p[0] = '\0'; } CSTRING(const char* str) { int len = strlen(str); p = new char[len + 1]; strcpy(p, str); } CSTRING(const CSTRING& str) { int len = strlen(str.p); p = new char[len + 1]; strcpy(p, str.p); } CSTRING operator+=( CSTRING& s) { char* str = new char[strlen(p) + strlen(s.p) + 3]; str[0] = '\0'; strcat(str, p); strcat(str, "--"); strcat(str, s.p); delete[]p; p = str; return this; } friend ostream& operator<<(ostream& out, CSTRING& str); friend istream& operator>>(istream& in, CSTRING& str); int operator>(const CSTRING& str); }; ostream& operator<<(ostream& out, CSTRING& str) { out << str.p; return out; } istream& operator>>(istream& in, CSTRING& str) { in >> str.p; return in; } int CSTRING:: operator>(const CSTRING& str) { if (strcmp(p, str.p)>0){ return 1; }else {return 0; } } int main() { int n, i, j; while (cin >> n) { CSTRING c = new CSTRING[n + 2]; for (i = 0; i < n; i++) { cin >> c[i]; } for (i = 0; i < n - 1; i++) for (j = 0; j < n - i - 1; j++) if (c[j] > c[j + 1]) { c[n] = c[j]; c[j] = c[j + 1]; c[j + 1] = c[n]; } for (i = 0; i < n; i++) c[n + 1] += c[i]; cout << c[n + 1] << endl; delete[] c; } return 0; }

CSTRING CSTRING::operator+=(CSTRING& s) { char* str = new char[strlen(p) + strlen(s.p) + 3]; str[0] = '\0'; strcat(str, p); strcat(str, "--"); strcat(str, s.p); delete[]p; p = str; return *...

void CFindDlg::OnBnClickedButton1() { // TODO: 在此添加控件通知处理程序代码 m_Listbox.ResetContent(); //清空列表框的内容 CString name; //获取当前选中项 int index = m_comboName.GetCurSel(); //获取组合框当前内容 m_comboName.GetLBText(index, name); CInfoFile file; file.ReadDocline(); for (list<stu>::iterator it = file.ls.begin(); it != file.ls.end(); it++) { CStringA str; char* strname; str = name; //CString 转CStringA strname = str.GetBuffer();//CString 转为char * if (it->name == strname) { const char* szID = "学号："; const char* szName = "姓名："; const char* szAge = "年龄："; const char* szGrade = "成绩："; CString strID(szID), strName(szName), strAge(szAge), strGrade(szGrade); CString str; str.Format(_T("%d"), it->id); str = strID + str + _T("\r\n"); m_Listbox.AddString(str); str = CString(it->name.c_str()); str = strName + str + _T("\r\n"); m_Listbox.AddString(str); str.Format(_T("%d"), it->age); str = strAge + str + _T("\r\n"); m_Listbox.AddString(str); str.Format(_T("%d"), it->grade); str = strGrade + str + _T("\r\n"); m_Listbox.AddString(str); } } }为什么输出在列表框内的内容顺序是倒着的，先输出成绩最后输出学号

std::vector<CString> strList; 然后在循环中将需要输出的字符串添加到列表中： strList.push_back(strID + str + _T("\r\n")); strList.push_back(strName + str + _T("\r\n")); strList.push_back...

#include<iostream> #include<cstring> using namespace std; class CSTRING { private: char p; public: CSTRING() { p = new char[10]; strcpy(p,""); } CSTRING(const char str) { p = new char[strlen(str) + 1]; strcpy(p, str); } CSTRING(const CSTRING &str) { p = new char[strlen(str.p) + 1]; strcpy(p, str.p); } ~CSTRING() { if (p != NULL) { delete[] p; } } bool operator > (const CSTRING &str) const { return strcmp(p, str.p) > 0; } CSTRING& operator = (const CSTRING &str) { if(this==&str) { return this; } delete [] p; p=new char[strlen(str.p)+1]; strcpy(p,str.p); return this; } CSTRING& operator += (const CSTRING &str) { char temp = new char[strlen(p) + 1]; strcpy(temp, p); char ans = new char[strlen(p) + strlen(str.p) + 3]; strcat(ans,temp); strcpy(ans,"--"); strcat(ans, str.p); if (p != NULL) { delete[] p; } p = ans; return this; } friend istream& operator >> (istream &in, CSTRING &str) { char temp[100]; in >> temp; str = CSTRING(temp); return in; } friend ostream& operator << (ostream &out, const CSTRING &str) { out <<str.p; return out; } }; int main() { #ifdef _CRT_SECURE_NO_WARNINGS freopen("./in.txt", "r", stdin); freopen("./out.txt", "w", stdout); #endif int n,i,j; while(cin>>n) { CSTRING c=new CSTRING[n+2]; for(i=0;i<n;i++) { cin>>c[i]; } for(i=0;i<n-1;i++) for(j=0;j<n-1-i;j++) if(c[j]>c[j+1]) { c[n]=c[j]; c[j]=c[j+1]; c[j+1]=c[n]; } for(i=0;i<n;i++) { c[n+1]+=c[i]; } cout<<c[n+1]<<endl; delete[] c; } return 0; }，上述代码，在输入3 aaa bbb ccc时要实现输出--aaa--bbb--ccc应该怎样修改

在主函数中的最后输出语句，将 c[n+1] 改为 cout [n+1] ; 即可在输出时添加 "--"。修改后的代码如下： cpp int main() { ... c[n + 1] += c[i]; } cout [n + 1] ; delete[] c; } return 0; }

Char_Cstring_TCHAR.rar_C++ CString CHAR_Char_Cstring_TCHAR_TCHAR

在"Char_Cstring_TCHAR.rar_C++ CString CHAR_Char_Cstring_TCHAR_TCHAR"这个压缩包中，包含的资源可能是一些示例代码，用于演示如何在这些类型之间进行转换。让我们深入探讨这些概念： 1. **CHAR**： CHAR是C++...

CString常用方法_的方法_CString_

在Microsoft Foundation Classes (MFC) 库中，CString 是一个非常重要的类，它提供了一个强大且方便的字符串操作接口。这个类是基于C++的，并且在处理字符串时提供了许多C语言风格的字符串（如char*）所没有的...

_CString_use_method.rar_CString排序_字符串

本压缩包文件 "_CString_use_method.rar_CString排序_字符串" 提供了一些关于CString类的示例代码，主要关注两个功能：字符串排序和文件输出。下面我们将详细探讨这两个知识点。首先，CString提供了丰富的成员...

CString-to-char(Unicode).rar_CString_cstring char*_cstring to ch

标题"CString-to-char(Unicode).rar_CString_cstring char*_cstring to ch"暗示了我们正在讨论如何在Unicode环境中将Microsoft的CString类对象转换为C风格的char*指针。CString是MFC（Microsoft Foundation ...

Cstring-Operation.rar_CString_operation

- + 运算符：可以与其他CString或C风格字符串进行拼接，如str = str1 + str2。 4. **长度和比较**： - GetLength()：返回字符串的长度。 - Compare：比较两个字符串，可以区分大小写或不区分大小写。 ...

void CFindDlg::OnBnClickedButton1() { // TODO: 在此添加控件通知处理程序代码 m_Listbox.ResetContent(); //清空列表框的内容 CString name; //获取当前选中项 int index = m_comboName.GetCurSel(); //获取组合框当前内容 m_comboName.GetLBText(index, name); CInfoFile file; file.ReadDocline(); for (list<stu>::iterator it = file.ls.begin(); it != file.ls.end(); it++) { CStringA str; char* strname; str = name; //CString 转CStringA strname = str.GetBuffer();//CString 转为char * if (it->name == strname) { const char* szID = "学号："; const char* szName = "姓名："; const char* szAge = "年龄："; const char* szGrade = "成绩："; CString strID(szID), strName(szName), strAge(szAge), strGrade(szGrade); CString str; std::vector<CString> strList; str.Format(_T("%d"), it->id); strList.push_back(strID + str + _T("\r\n")); str = CString(it->name.c_str()); strList.push_back(strName + str + _T("\r\n")); str.Format(_T("%d"), it->age); strList.push_back(strAge + str + _T("\r\n")); str.Format(_T("%d"), it->grade); strList.push_back(strGrade + str + _T("\r\n")); for (int i = 0; i < strList.size(); i++) { m_Listbox.AddString(strList[i]); }}}}为什么输出在列表框的内容顺序倒过来了，第一个是成绩，最后一个是学号

strList.push_back(strID + str + _T("\r\n")); strList.push_back(strName + str + _T("\r\n")); strList.push_back(strAge + str + _T("\r\n")); strList.push_back(strGrade + str + _T("\r\n")); 改为： ...

设计字符串类CSTRING，包含私有成员数据p（char p）。根据给定的main函数设计必要的成员函数。int main() {int n,i,j; while(cin>>n) {CSTRING c=new CSTRING[n+2]; for(i=0;i<n;i+ +) {cin>>c[i]; } for(=O;i<n-1;i+ +) for(j=0;j<n-i-1;j++) if(C[j]>C[j+1]) {c[n]=c[j]; c[j]=c[j+1]; C[j+1]=c[N]; } for(i=O;i<n;i++) c[n+1]+=c[i]; cout< <c[n+1]<<endl;, delete[]C; return O; } retunr 0; }输入： 3 aaa ccc bbb 输出： --aaa--bbb--ccc

CSTRING(const CSTRING& str) { p = new char[strlen(str.p) + 1]; strcpy(p, str.p); } ~CSTRING() { delete[] p; } const char* c_str() const { return p; } friend bool operator<(const CSTRING&...

没听懂吗？#include <cstring> #include <iostream> using namespace std; class CString { char s; int n; public: CString(char const _s = nullptr) : s(nullptr), n(0) { if (!_s) return; n = strlen(_s); s = new char[n + 1]{}; strncpy(s, _s, n); // 记得 #include <cstring> } ~CString() { delete []s; } // 1. 要求重载 '+' 运算符, 实现两个CString对象相加的结果 // （不能改变原来的两个CString对象） // ...可以补充其它成员函数... / Write your code here! / /***********************************/ int main() { int n; char input[64 + 1]{}; // ! strlen(s) + 1 cin >> n; while (n--) { cin >> input; CString s1(input); cin >> input; CString s2(input); CString sEmpty; // ! delete new CString(s1 = s1 + s2); // ! cout << s1 + sEmpty << endl << sEmpty + s2 << endl << s1 + s2 << endl << endl; } return 0; }往里面填数字

### 实现 CString 类的加法运算符重载在 C++ 中，为了实现两个 CString 对象相加的功能，并确保不改变原始对象且... CString result = str1 + str2; result.print(); // 输出 "Hello, world!" return 0; }

str.Format(L"%d ",m_iHCount); hotel+=str;

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