我正在尝试创建一个程序，在我拥有的宇宙模拟游戏中为行星生成疯狂的lib样式故事。它的设计使用户可以在.txt文件中输入故事模板，故事模板中的变量放在百分号内。该程序读取.txt文件，提取故事，查找变量，并使用适当的随机信息填充变量（目前，我只定义了两个变量）。
我遇到的问题是它不会替换故事中的变量，即使我调试它的所有尝试（正如您将在代码/输出中看到的）显示计算机生成适当的文本，并且识别该变量在文本中。
问题的实际行在“GetVar（）”函数定义内的底部附近。
完整程序（减去控件初始化以缩短时间）：
#pragma once
namespace SpaceEngineStoryTeller {
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 System::IO;
/// <summary>
/// Summary for Form1
/// </summary>
public ref class Form1 : public System::Windows::Forms::Form
{
public:
Form1(void) {
InitializeComponent();
//
//TODO: Add the constructor code here
//
}
protected:
/// <summary>
/// Clean up any resources being used.
/// </summary>
~Form1() {
delete components;
}
private:
System::Windows::Forms::TabControl^ tabControl1;
System::Windows::Forms::TabPage^ tabPage1;
System::Windows::Forms::Label^ label4;
System::Windows::Forms::Label^ label3;
System::Windows::Forms::Label^ label2;
System::Windows::Forms::Label^ label1;
System::Windows::Forms::TabPage^ tabPage2;
System::Windows::Forms::Label^ label7;
System::Windows::Forms::Label^ label6;
System::Windows::Forms::Label^ label5;
System::Windows::Forms::ComboBox^ TemperatureBox;
System::Windows::Forms::Label^ label11;
System::Windows::Forms::TabPage^ tabPage3;
System::Windows::Forms::RichTextBox^ ExportBox;
System::Windows::Forms::Label^ label10;
System::Windows::Forms::PictureBox^ pictureBox1;
System::Windows::Forms::RichTextBox^ ImportBox;
System::Windows::Forms::Label^ label9;
System::Windows::Forms::RichTextBox^ StoryBox;
System::Windows::Forms::Label^ label8;
System::Windows::Forms::ComboBox^ LifeBox;
System::Windows::Forms::Label^ label13;
System::Windows::Forms::ComboBox^ TypeBox;
System::Windows::Forms::Label^ label12;
System::Windows::Forms::TextBox^ AtmosphereBox;
System::Windows::Forms::Label^ label15;
System::Windows::Forms::TextBox^ GravityBox;
System::Windows::Forms::Label^ label14;
System::Windows::Forms::Label^ label16;
System::Windows::Forms::Button^ button1;
System::Windows::Forms::CheckBox^ SubglacialCheck;
System::Windows::Forms::CheckBox^ TerrestrialCheck;
System::Windows::Forms::CheckBox^ MarineCheck;
System::Windows::Forms::CheckBox^ FloatersCheck;
System::Windows::Forms::PictureBox^ pictureBox3;
System::Windows::Forms::PictureBox^ pictureBox2;
/// <summary>
/// Required designer variable.
int StoriesCtr, SpaceRacesCtr, NonSpaceRacesCtr, varctr, RndHolder, ArrayLength, StoryLength;
Random ^ Rnd;
String^ path;
static array<String^>^ var=gcnew array<String^>(65535);
static array<String^>^ Stories=gcnew array<String^>(65535);
static array<String^>^ subStory=gcnew array<String^>(65535);
static array<String^>^ SpaceRaces=gcnew array<String^>(65535);
static array<String^>^ NonSpaceRaces=gcnew array<String^>(65535);
/// </summary>
System::ComponentModel::Container ^components;
#pragma region Windows Form Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private:
void InitializeComponent(void) {
//Omitted Code
}
#pragma endregion
private:
System::Void Form1_Load(System::Object^ sender, System::EventArgs^ e) {
StoriesCtr=0;
SpaceRacesCtr=0;
NonSpaceRacesCtr=0;
varctr=0;
ArrayLength=0;
Rnd=gcnew Random;
path="C:\\Users\\Ben\\Documents\\Visual Studio 2012\\Projects\\SpaceEngine Story Teller\\Resources\\Stories.txt";
StreamReader^ StoryReader = gcnew StreamReader(path, true);
while(StoryReader->EndOfStream==false) {
Stories[StoriesCtr]=StoryReader->ReadLine();
StoriesCtr++;
}
StoryReader->Close();
path="C:\\Users\\Ben\\Documents\\Visual Studio 2012\\Projects\\SpaceEngine Story Teller\\Resources\\SpaceRaces.txt";
StreamReader^ SpaceRacesReader = gcnew StreamReader(path, true);
while(SpaceRacesReader->EndOfStream==false) {
SpaceRaces[SpaceRacesCtr]=SpaceRacesReader->ReadLine();
SpaceRacesCtr++;
}
SpaceRacesReader->Close();
path="C:\\Users\\Ben\\Documents\\Visual Studio 2012\\Projects\\SpaceEngine Story Teller\\Resources\\NonSpaceRaces.txt";
StreamReader^ NonSpaceRacesReader = gcnew StreamReader(path, true);
while(NonSpaceRacesReader->EndOfStream==false) {
NonSpaceRaces[NonSpaceRacesCtr]=NonSpaceRacesReader->ReadLine();
NonSpaceRacesCtr++;
}
NonSpaceRacesReader->Close();
for(int i=0; i<StoriesCtr; i++) {
StoryLength=Stories[i]->Length;
GetVar(Stories[i]);
this->StoryBox->Text+=Stories[i]+"\n";
}
}
System::Void LifeBox_SelectedIndexChanged(System::Object^ sender, System::EventArgs^ e) {
if(this->LifeBox->SelectedIndex!=0) {
this->TerrestrialCheck->Enabled=true;
this->MarineCheck->Enabled=true;
this->SubglacialCheck->Enabled=true;
this->FloatersCheck->Enabled=true;
this->label16->Enabled=true;
} else {
this->TerrestrialCheck->Enabled=false;
this->MarineCheck->Enabled=false;
this->SubglacialCheck->Enabled=false;
this->FloatersCheck->Enabled=false;
this->label16->Enabled=false;
}
}
void GetVar(String^ str) {//Finds variables in story, and replaces them with random information
for(int a=0; a<str->Length; a++)
subStory[a]=str->Substring(a, 1);
for(int b=0; b<str->Length; b++) {
if(subStory[b]=="%") {//Beginning of variable
for(int c=(b+1); c<str->Length; c++) {
if(subStory[c]=="%") {//End of variable
for(int d=(b+1); d<c; d++)//Generates variable from substrings
var[varctr]+=subStory[d];
for(int e=0; e<=varctr; e++) {//Replaces instances of variables in story with randomly generated terms.
if(var[e]=="SpaceRace") {
this->StoryBox->Text+="SpaceRace: ";
RndHolder=Rnd->Next()%GetArrayLength(SpaceRaces);
this->StoryBox->Text+=RndHolder+"\n";
var[varctr]=SpaceRaces[RndHolder];
this->StoryBox->Text+=var[varctr]+"\n";
if(str->Contains("%SpaceRace%"))
this->StoryBox->Text+="Contains SpaceRace"+"\n";
str->Replace("%SpaceRace%", var[varctr]);//Problem line
} else if(var[e]=="NonSpaceRace") {
this->StoryBox->Text+="NonSpaceRace: ";
RndHolder=Rnd->Next()%GetArrayLength(NonSpaceRaces);
this->StoryBox->Text+=RndHolder+"\n";
var[varctr]=NonSpaceRaces[RndHolder];
this->StoryBox->Text+=var[varctr]+"\n";
if(str->Contains("%SpaceRace%"))
this->StoryBox->Text+="Contains NonSpaceRace"+"\n";
str->Replace("%NonSpaceRace%", var[varctr]);//Problem line
}
}
varctr++;
break;
}
}
}
}
}
int GetArrayLength(static array<String^>^ Array) {//Returns how many indexes of array are non-null
for(int i=0; i<Array->Length; i++) {
if(Array[i]==nullptr)
return ArrayLength;
ArrayLength++;
}
return ArrayLength;
}
};
}
输出结果如何：
SpaceRace: 9
Chevin
Contains SpaceRace
NonSpaceRace: 536
Vors
Contains NonSpaceRace
%SpaceRace% is a space-faring species in Star Wars, and %NonSpaceRace% is a non-space-fairing species in Star Wars.
输出应该是什么样的：
SpaceRace: 9
Chevin
Contains SpaceRace
NonSpaceRace: 536
Vors
Contains NonSpaceRace
Chevin is a space-faring species in Star Wars, and Vors is a non-space-fairing species in Star Wars.
Stories.txt的内容（供参考）：
%SpaceRace% is a space-faring species in Star Wars, and %NonSpaceRace% is a non-space-fairing species in Star Wars.
答案 0 :(得分：0)
String.Replace返回带有替换值的新字符串，不进行就地替换。而不是：
str->Replace("%SpaceRace%", var[varctr]);
你需要
str = str->Replace("%SpaceRace%", var[varctr]);
有关详情，请参阅the MSDN entry for String.Replace。