我正在编写一个程序，应该列出一些任务，按日期排序等等。
我做的最后一件事是添加“按日期排序”功能。在此之前一切正常。如果我现在运行我的代码，我收到以下错误消息（我收到此消息3次）
member function already defined or declared
我不明白，有什么不对。触发错误的代码看起来像这样（之后我会在pastebin上发布完整的代码;你也应该知道，这是德国的日期格式，这意味着，day.month.year）
static bool compareDates(entry e1, entry e2) { // I also tried without "static"; this part of the code is above the class
string s1 = e1.date;
string s2 = e2.date;
int day_1 = atoi(s1.substr(0, 2).c_str());
int month_1 = atoi(s1.substr(3, 2).c_str()); // dd.mm.yyyy
int year_1 = atoi(s1.substr(6, 4).c_str());
int day_2 = atoi(s2.substr(0, 2).c_str());
int month_2 = atoi(s2.substr(3, 2).c_str());
int year_2 = atoi(s2.substr(6, 4).c_str());
if (year_1 > year_2) return true;
else if (year_1 < year_2) return false;
if (month_1 > month_2) return true;
else if (month_1 < month_2) return false;
if (day_1 > day_2) return true;
else if (day_1 < day_2) return false;
return true;
}
// ... some code between ...
private: void sortList() { // in the class
sort(john_lines.begin(), john_lines.end(), compareDates);
sort(tomas_lines.begin(), tomas_lines.end(), compareDates);
sort(bernd_lines.begin(), bernd_lines.end(), compareDates);
sort(peter_lines.begin(), peter_lines.end(), compareDates);
}
我试图在没有其余部分的情况下运行此代码，并且它有效。
有人知道我的申请有什么问题吗？
如果您认为错误发生在其他文件中，只需说出来，我会发布它们。
完整错误：
Error 1 error C2535: 'void BüroPlaner_V2::MainWindow::sortList(void)' : member function already defined or declared c:\users\phantom6208\documents\visual studio 2013\projects\büro planer_v2\büro planer_v2\MainWindow.h 422 1 Büro Planer_V2
错误14错误C2535：'voidBüroPlaner_V2:: MainWindow :: sortList（void）'：已定义或声明的成员函数c：\ users \ phantom6208 \ documents \ visual studio 2013 \ projects \büroplaner_v2\büroplaner_v2\ MainWindow .h 4221BüroPlaner_V2
错误28错误C2535：'voidBüroPlaner_V2:: MainWindow :: sortList（void）'：已定义或声明的成员函数c：\ users \ phantom6208 \ documents \ visual studio 2013 \ projects \büroplaner_v2\büroplaner_v2\ MainWindow .h 4221BüroPlaner_V2
小测试部分：
#include <vector>
#include <fstream>
#include <iostream>
#include <string>
#include <sstream>
#include <exception>
#include <algorithm>
#include <stdio.h>
using namespace std;
struct entry {
string text;
string date;
bool finished;
};
vector< entry > john_lines;
bool compareDates(entry e1, entry e2) {
string s1 = e1.date;
string s2 = e2.date;
int day_1 = atoi(s1.substr(0, 2).c_str());
int month_1 = atoi(s1.substr(3, 2).c_str()); // dd.mm.yyyy
int year_1 = atoi(s1.substr(6, 4).c_str());
int day_2 = atoi(s2.substr(0, 2).c_str());
int month_2 = atoi(s2.substr(3, 2).c_str());
int year_2 = atoi(s2.substr(6, 4).c_str());
if (year_1 > year_2) return true;
else if (year_1 < year_2) return false;
if (month_1 > month_2) return true;
else if (month_1 < month_2) return false;
if (day_1 > day_2) return true;
else if (day_1 < day_2) return false;
return true;
}
int main() {
entry e;
e = { "clean the window", "12.08.2016", true };
john_lines.push_back(e);
e = { "tidy the room", "14.06.2012", false };
john_lines.push_back(e);
e = { "sort the papers", "16.08.2016", false };
john_lines.push_back(e);
e = { "writing the code for this application", "19.08.2018", false };
john_lines.push_back(e);
e = { "test period of this applicaition", "30.11.2020", false };
john_lines.push_back(e);
cout << "-------------------------------------------------------------------------------" << endl;
cout << "- before: -" << endl;
cout << "-------------------------------------------------------------------------------" << endl;
for(int i=0; i<john_lines.size(); i++) {
e = john_lines.at(i);
string finished = (e.finished) ? "( done ) " : "(not done) ";
cout << finished << e.date << " - " << e.text << endl;
}
cout << endl << endl;
sort(john_lines.begin(), john_lines.end(), compareDates);
cout << "-------------------------------------------------------------------------------" << endl;
cout << "- after: -" << endl;
cout << "-------------------------------------------------------------------------------" << endl;
for(int i=0; i<john_lines.size(); i++) {
e = john_lines.at(i);
string finished = (e.finished) ? "( done ) " : "(not done) ";
cout << finished << e.date << " - " << e.text << endl;
}
}
所有代码：
#include <windows.h>
#include <tchar.h>
#include <stdio.h>
#include <dirent.h>
#include <vector>
#include <fstream>
#include <iostream>
#include <string>
#include <sstream>
#include <exception>
#include <algorithm>
#include <functional>
#include "AddWindow.h"
#pragma once
namespace BüroPlaner_V2 {
using namespace System;
using namespace System::ComponentModel;
using namespace System::Collections;
using namespace System::Windows::Forms;
using namespace System::Data;
using namespace System::Drawing;
using namespace std;
struct entry {
string text;
string date;
bool finished;
};
static bool compareDates(entry e1, entry e2) {
string s1 = e1.date;
string s2 = e2.date;
int day_1 = atoi(s1.substr(0, 2).c_str());
int month_1 = atoi(s1.substr(3, 2).c_str()); // dd.mm.yyyy
int year_1 = atoi(s1.substr(6, 4).c_str());
int day_2 = atoi(s2.substr(0, 2).c_str());
int month_2 = atoi(s2.substr(3, 2).c_str());
int year_2 = atoi(s2.substr(6, 4).c_str());
if (year_1 > year_2) return true;
else if (year_1 < year_2) return false;
if (month_1 > month_2) return true;
else if (month_1 < month_2) return false;
if (day_1 > day_2) return true;
else if (day_1 < day_2) return false;
return true;
}
static vector< string > john_vec;
static vector< string > tomas_vec;
static vector< string > peter_vec;
static vector< string > bernd_vec;
static vector< entry > john_lines;
static vector< entry > tomas_lines;
static vector< entry > peter_lines;
static vector< entry > bernd_lines;
public ref class MainWindow : public System::Windows::Forms::Form
{
private: AddWindow^ addWindow;
private: bool strtobool(string s) {
if (s == "true") return true;
else return false;
}
public:
MainWindow(void)
{
InitializeComponent();
loadContent();
drawToList();
}
private: void loadContent() {
john_vec.clear();
tomas_vec.clear();
peter_vec.clear();
bernd_vec.clear();
john_lines.clear();
tomas_lines.clear();
peter_lines.clear();
bernd_lines.clear();
for (int i = 0; i < 4; i++) {
string person;
switch (i) {
case 0: person = "john"; break;
case 1: person = "tomas"; break;
case 2: person = "peter"; break;
case 3: person = "bernd"; break;
}
DIR *dir;
struct dirent *ent;
if ((dir = opendir(("c:\\bueroplaner\\" + person + "\\").c_str())) != NULL) {
while ((ent = readdir(dir)) != NULL) {
string line(ent->d_name);
switch (i) {
case 0: john_vec.push_back(line); break;
case 1: tomas_vec.push_back(line); break;
case 2: peter_vec.push_back(line); break;
case 3: bernd_vec.push_back(line); break;
}
}
closedir(dir);
}
}
john_vec.erase(john_vec.begin());
john_vec.erase(john_vec.begin());
tomas_vec.erase(tomas_vec.begin());
tomas_vec.erase(tomas_vec.begin());
peter_vec.erase(peter_vec.begin());
peter_vec.erase(peter_vec.begin());
bernd_vec.erase(bernd_vec.begin());
bernd_vec.erase(bernd_vec.begin());
for (int i = 0; i < 4; i++) {
int count = 0; string person;
switch (i) {
case 0: count = john_vec.size(); person = "john"; break;
case 1: count = tomas_vec.size(); person = "tomas"; break;
case 2: count = peter_vec.size(); person = "peter"; break;
case 3: count = bernd_vec.size(); person = "bernd"; break;
}
for (int j = 0; j < count; j++) {
ifstream ifs;
string path;
switch (i) {
case 0: path = "c:/bueroplaner/john/" + john_vec.at(j); break;
case 1: path = "c:/bueroplaner/tomas/" + tomas_vec.at(j); break;
case 2: path = "c:/bueroplaner/peter/" + peter_vec.at(j); break;
case 3: path = "c:/bueroplaner/bernd/" + bernd_vec.at(j); break;
} ifs.open(path);
try {
string lines[3];
for (int h = 0; h < 3; h++) {
string line;
getline(ifs, line);
lines[h] = line;
}
entry e = { lines[0], lines[1], strtobool(lines[2]) };
switch (i) {
case 0: john_lines.push_back(e); break;
case 1: tomas_lines.push_back(e); break;
case 2: peter_lines.push_back(e); break;
case 3: bernd_lines.push_back(e); break;
}
}
catch (...) { MessageBox::Show("file unreadable or wrong syntax!"); }
ifs.close();
}
}
}
private: void drawToList() {
this->john_list->Items->Clear();
for (int i = 0; i < john_lines.size(); i++) {
string tf = (john_lines.at(i).finished) ? " done " : "not done";
String^ str = gcnew String(("(" + tf + ") " + john_lines.at(i).date + " - " + john_lines.at(i).text).c_str());
this->john_list->Items->Add(str);
}
this->tomas_list->Items->Clear();
for (int i = 0; i < tomas_lines.size(); i++) {
string tf = (tomas_lines.at(i).finished) ? " done " : "not done";
String^ str = gcnew String(("(" + tf + ") " + tomas_lines.at(i).date + " - " + tomas_lines.at(i).text).c_str());
this->tomas_list->Items->Add(str);
}
this->peter_list->Items->Clear();
for (int i = 0; i < peter_lines.size(); i++) {
string tf = (peter_lines.at(i).finished) ? " done " : "not done";
String^ str = gcnew String(("(" + tf + ") " + peter_lines.at(i).date + " - " + peter_lines.at(i).text).c_str());
this->peter_list->Items->Add(str);
}
this->bernd_list->Items->Clear();
for (int i = 0; i < bernd_lines.size(); i++) {
string tf = (bernd_lines.at(i).finished) ? " done " : "not done";
String^ str = gcnew String(("(" + tf + ") " + bernd_lines.at(i).date + " - " + bernd_lines.at(i).text).c_str());
this->bernd_list->Items->Add(str);
}
}
protected: ~MainWindow()
{
saveStuff();
if (components) { delete components; }
}
private: System::Windows::Forms::TabControl^ tabControl1;
private: System::Windows::Forms::TabPage^ john;
private: System::Windows::Forms::TabPage^ bernd;
private: System::Windows::Forms::TabPage^ tomas;
private: System::Windows::Forms::TabPage^ peter;
private: System::Windows::Forms::ListBox^ bernd_list;
private: System::Windows::Forms::ListBox^ tomas_list;
private: System::Windows::Forms::ListBox^ peter_list;
private: System::Windows::Forms::ListBox^ john_list;
private: System::Windows::Forms::Button^ addEntry;
private: System::Windows::Forms::Button^ removeEntry;
private: System::ComponentModel::Container ^components;
#pragma region Windows Form Designer generated code
void InitializeComponent(void)
{
this->tabControl1 = (gcnew System::Windows::Forms::TabControl());
this->john = (gcnew System::Windows::Forms::TabPage());
this->john_list = (gcnew System::Windows::Forms::ListBox());
this->bernd = (gcnew System::Windows::Forms::TabPage());
this->bernd_list = (gcnew System::Windows::Forms::ListBox());
this->tomas = (gcnew System::Windows::Forms::TabPage());
this->tomas_list = (gcnew System::Windows::Forms::ListBox());
this->peter = (gcnew System::Windows::Forms::TabPage());
this->peter_list = (gcnew System::Windows::Forms::ListBox());
this->addEntry = (gcnew System::Windows::Forms::Button());
this->removeEntry = (gcnew System::Windows::Forms::Button());
this->tabControl1->SuspendLayout();
this->john->SuspendLayout();
this->bernd->SuspendLayout();
this->tomas->SuspendLayout();
this->peter->SuspendLayout();
this->SuspendLayout();
//
// tabControl1
//
this->tabControl1->Controls->Add(this->john);
this->tabControl1->Controls->Add(this->bernd);
this->tabControl1->Controls->Add(this->tomas);
this->tabControl1->Controls->Add(this->peter);
this->tabControl1->Font = (gcnew System::Drawing::Font(L"Microsoft Sans Serif", 12, System::Drawing::FontStyle::Regular, System::Drawing::GraphicsUnit::Point,
static_cast<System::Byte>(0)));
this->tabControl1->ItemSize = System::Drawing::Size(118, 25);
this->tabControl1->Location = System::Drawing::Point(-1, -1);
this->tabControl1->Name = L"tabControl1";
this->tabControl1->Padding = System::Drawing::Point(50, 3);
this->tabControl1->SelectedIndex = 0;
this->tabControl1->Size = System::Drawing::Size(578, 258);
this->tabControl1->TabIndex = 0;
this->tabControl1->TabStop = false;
//
// john
//
this->john->Controls->Add(this->john_list);
this->john->Location = System::Drawing::Point(4, 29);
this->john->Name = L"john";
this->john->Padding = System::Windows::Forms::Padding(3, 3, 3, 3);
this->john->Size = System::Drawing::Size(570, 225);
this->john->TabIndex = 0;
this->john->Text = L"John";
this->john->UseVisualStyleBackColor = true;
//
// john_list
//
this->john_list->Font = (gcnew System::Drawing::Font(L"Lucida Console", 12, System::Drawing::FontStyle::Regular, System::Drawing::GraphicsUnit::Point,
static_cast<System::Byte>(0)));
this->john_list->FormattingEnabled = true;
this->john_list->ItemHeight = 16;
this->john_list->Location = System::Drawing::Point(-4, 0);
this->john_list->Name = L"john_list";
this->john_list->Size = System::Drawing::Size(578, 228);
this->john_list->TabIndex = 1;
//
// bernd
//
this->bernd->Controls->Add(this->bernd_list);
this->bernd->Location = System::Drawing::Point(4, 29);
this->bernd->Name = L"bernd";
this->bernd->Padding = System::Windows::Forms::Padding(3, 3, 3, 3);
this->bernd->Size = System::Drawing::Size(570, 225);
this->bernd->TabIndex = 1;
this->bernd->Text = L"Bernd";
this->bernd->UseVisualStyleBackColor = true;
//
// bernd_list
//
this->bernd_list->Font = (gcnew System::Drawing::Font(L"Lucida Console", 12));
this->bernd_list->FormattingEnabled = true;
this->bernd_list->ItemHeight = 16;
this->bernd_list->Location = System::Drawing::Point(-4, 0);
this->bernd_list->Name = L"bernd_list";
this->bernd_list->Size = System::Drawing::Size(578, 228);
this->bernd_list->TabIndex = 0;
//
// tomas
//
this->tomas->Controls->Add(this->tomas_list);
this->tomas->Location = System::Drawing::Point(4, 29);
this->tomas->Name = L"tomas";
this->tomas->Size = System::Drawing::Size(570, 225);
this->tomas->TabIndex = 2;
this->tomas->Text = L"Tomas";
this->tomas->UseVisualStyleBackColor = true;
//
// tomas_list
//
this->tomas_list->Font = (gcnew System::Drawing::Font(L"Lucida Console", 12));
this->tomas_list->FormattingEnabled = true;
this->tomas_list->ItemHeight = 16;
this->tomas_list->Location = System::Drawing::Point(-4, 0);
this->tomas_list->Name = L"tomas_list";
this->tomas_list->Size = System::Drawing::Size(578, 228);
this->tomas_list->TabIndex = 2;
//
// peter
//
this->peter->Controls->Add(this->peter_list);
this->peter->Location = System::Drawing::Point(4, 29);
this->peter->Name = L"peter";
this->peter->Size = System::Drawing::Size(570, 225);
this->peter->TabIndex = 3;
this->peter->Text = L"Peter";
this->peter->UseVisualStyleBackColor = true;
//
// peter_list
//
this->peter_list->Font = (gcnew System::Drawing::Font(L"Lucida Console", 12));
this->peter_list->FormattingEnabled = true;
this->peter_list->ItemHeight = 16;
this->peter_list->Location = System::Drawing::Point(-4, 0);
this->peter_list->Name = L"peter_list";
this->peter_list->Size = System::Drawing::Size(578, 228);
this->peter_list->TabIndex = 2;
//
// addEntry
//
this->addEntry->Font = (gcnew System::Drawing::Font(L"Microsoft Sans Serif", 11.25F, System::Drawing::FontStyle::Regular, System::Drawing::GraphicsUnit::Point,
static_cast<System::Byte>(0)));
this->addEntry->Location = System::Drawing::Point(12, 266);
this->addEntry->Name = L"addEntry";
this->addEntry->Size = System::Drawing::Size(259, 40);
this->addEntry->TabIndex = 2;
this->addEntry->Text = L"Aufgabe Hinzufügen";
this->addEntry->UseVisualStyleBackColor = true;
this->addEntry->Click += gcnew System::EventHandler(this, &MainWindow::addEntry_Click);
//
// removeEntry
//
this->removeEntry->Font = (gcnew System::Drawing::Font(L"Microsoft Sans Serif", 11.25F, System::Drawing::FontStyle::Regular, System::Drawing::GraphicsUnit::Point,
static_cast<System::Byte>(0)));
this->removeEntry->Location = System::Drawing::Point(304, 266);
this->removeEntry->Name = L"removeEntry";
this->removeEntry->Size = System::Drawing::Size(259, 40);
this->removeEntry->TabIndex = 3;
this->removeEntry->Text = L"Aufgabe Erledigt";
this->removeEntry->UseVisualStyleBackColor = true;
this->removeEntry->Click += gcnew System::EventHandler(this, &MainWindow::removeEntry_Click);
//
// MainWindow
//
this->AutoScaleDimensions = System::Drawing::SizeF(6, 13);
this->AutoScaleMode = System::Windows::Forms::AutoScaleMode::Font;
this->ClientSize = System::Drawing::Size(575, 312);
this->Controls->Add(this->addEntry);
this->Controls->Add(this->removeEntry);
this->Controls->Add(this->tabControl1);
this->FormBorderStyle = System::Windows::Forms::FormBorderStyle::FixedSingle;
this->MaximizeBox = false;
this->MinimizeBox = false;
this->Name = L"MainWindow";
this->StartPosition = System::Windows::Forms::FormStartPosition::CenterScreen;
this->Text = L"Büro Planer";
this->tabControl1->ResumeLayout(false);
this->john->ResumeLayout(false);
this->bernd->ResumeLayout(false);
this->tomas->ResumeLayout(false);
this->peter->ResumeLayout(false);
this->ResumeLayout(false);
}
#pragma endregion
public: void refresh() { loadContent(); drawToList(); }
private: System::Void addEntry_Click(System::Object^ sender, System::EventArgs^ e) {
AddWindow^ frm = gcnew AddWindow(tabControl1->SelectedIndex, this);
frm->ShowDialog();
}
private: System::Void removeEntry_Click(System::Object^ sender, System::EventArgs^ e) {
if (tabControl1->SelectedIndex == 0) {
if (john_list->SelectedIndex != -1 && john_lines.size() >= john_list->SelectedIndex + 1)
john_lines.at(john_list->SelectedIndex).finished = true;
}
if (tabControl1->SelectedIndex == 1) {
if (bernd_list->SelectedIndex != -1 && bernd_lines.size() >= bernd_list->SelectedIndex + 1)
bernd_lines.at(bernd_list->SelectedIndex).finished = true;
}
if (tabControl1->SelectedIndex == 2) {
if (tomas_list->SelectedIndex != -1 && tomas_lines.size() >= tomas_list->SelectedIndex + 1)
tomas_lines.at(tomas_list->SelectedIndex).finished = true;
}
if (tabControl1->SelectedIndex == 3) {
if (peter_list->SelectedIndex != -1 && peter_lines.size() >= peter_list->SelectedIndex + 1)
peter_lines.at(peter_list->SelectedIndex).finished = true;
}
saveStuff();
drawToList();
}
private: void sortList() {
sort(john_lines.begin(), john_lines.end(), compareDates);
sort(tomas_lines.begin(), tomas_lines.end(), compareDates);
sort(bernd_lines.begin(), bernd_lines.end(), compareDates);
sort(peter_lines.begin(), peter_lines.end(), compareDates);
}
private: void saveStuff() {
for (int i = 0; i < john_lines.size(); i++) {
entry e = john_lines.at(i);
ofstream ofs("c:/bueroplaner/john/" + john_vec.at(i), ios::out);
string finished = (e.finished) ? "true" : "false";
ofs << e.text << endl;
ofs << e.date << endl;
ofs << finished << endl;
ofs.close();
}
for (int i = 0; i < tomas_lines.size(); i++) {
entry e = tomas_lines.at(i);
ofstream ofs("c:/bueroplaner/tomas/" + tomas_vec.at(i), ios::out);
string finished = (e.finished) ? "true" : "false";
ofs << e.text << endl;
ofs << e.date << endl;
ofs << finished << endl;
ofs.close();
}
for (int i = 0; i < bernd_lines.size(); i++) {
entry e = bernd_lines.at(i);
ofstream ofs("c:/bueroplaner/bernd/" + bernd_vec.at(i), ios::out);
string finished = (e.finished) ? "true" : "false";
ofs << e.text << endl;
ofs << e.date << endl;
ofs << finished << endl;
ofs.close();
}
for (int i = 0; i < peter_lines.size(); i++) {
entry e = peter_lines.at(i);
ofstream ofs("c:/bueroplaner/peter/" + peter_vec.at(i), ios::out);
string finished = (e.finished) ? "true" : "false";
ofs << e.text << endl;
ofs << e.date << endl;
ofs << finished << endl;
ofs.close();
}
}
};
}
答案 0 :(得分：1)
它在第83行声明，可能在别处定义。
private: void sortList();
您已在第422行重新定义
private: void sortList() {
sort(john_lines.begin(), john_lines.end(), compareDates);
sort(tomas_lines.begin(), tomas_lines.end(), compareDates);
sort(bernd_lines.begin(), bernd_lines.end(), compareDates);
sort(peter_lines.begin(), peter_lines.end(), compareDates);
}