有没有办法缩短这段代码？

Question

这是我在Visual C ++上的Q＆A游戏的代码

             if (this->answer->Text == "2"){
                 this->question->Text = "2+2?";
             }
             else if (this->answer->Text == "4"){
                 this->question->Text = "3+3?";
             }
             else if (this->answer->Text == "6"){
                 this->question->Text = "4+4?";
             }
             else if (this->answer->Text == "8"){
                 this->question->Text = "Finished!";
             }
             else {
                 MessageBox::Show("Wrong!!");
             }

有没有缩短这段代码？ 考虑使用数组？

Answer 1

我不是Windows程序员，不知道你的这个类型 - this->question->Text是什么，你没有告诉我们，但如果它是std::string或者可以转换为char * ，这应该工作：

std::string t = this->answer->Text;
this->question->Text = t == "2" ? "2+2?"
                     : t == "4" ? "3+3?"
                     : t == "6" ? "4+4?"
                     : t == "8" ? "Finished"
                     : "";
if (this->question->Text = "") MessageBox::Show("Wrong!!");

Answer 2

你正在重复if (this->answer->Text == and this->question->Text = 。只写一次并将条件和答案保存在std :: map中。

更新：

#include <map>
#include <string>

...

std::map<std::string,std::string> answers;
answers["2"]="2+2"; // "configuration
answers["4"]="3+3?";
//and so on
std::string text=this->answer->Text;
    // instead of if ...
std::map<std::string,std::string>::const_iterator found=answers.find(text);
if (found!=answers.end())
    this->question->Text = answers[text]; //once. Even better found->second
else
    MessageBox::Show("Wrong!!"); 

Answer 3

尝试使用switch case语句。