C++ Builder写的《ZEC 四则运算练习程序》 源代码 v0.9.1

//--------------------------------------------------------------------------- #include <vcl.h> #pragma hdrstop #include "Unit1.h" #include "About.h" //--------------------------------------------------------------------------- #pragma package(smart_init) #pragma resource "*.dfm" TForm1 *Form1; //--------------------------------------------------------------------------- __fastcall TForm1::TForm1(TComponent* Owner) : TForm(Owner) { Application->Title="ZEC 四则运算"; numMax=10; srand((unsigned)time(NULL)); //算式编辑框文本靠右 SetWindowLong(edtEquation->Handle, GWL_STYLE, GetWindowLong(edtEquation->Handle, GWL_STYLE)|ES_RIGHT); ActiveControl=Edit1; tag=2; //专项练习默认为乘法运算 } //--------------------------------------------------------------------------- void __fastcall TForm1::RadioButton1Click(TObject *Sender) { numMax=10; Edit1->SetFocus(); } //--------------------------------------------------------------------------- void __fastcall TForm1::RadioButton2Click(TObject *Sender) { numMax=20; Edit1->SetFocus(); } //--------------------------------------------------------------------------- //点击下一题按钮 void __fastcall TForm1::btnNextClick(TObject *Sender) { if(mnuSpecial->Checked) op=tag; else op=rand()%4; a=rand()%numMax; b=rand()%numMax; switch(op) { case 0: //加法 edtEquation->Text=IntToStr(a)+" + "+IntToStr(b)+" ="; rightAnswer=a+b; Label1->Caption="加法题："+IntToStr(++addEquationCount)+" 道"; break; case 1: //减法 if(a<b) { temp=a; a=b; b=temp; } edtEquation->Text=IntToStr(a)+" - "+IntToStr(b)+" ="; rightAnswer=a-b; Label2->Caption="减法题："+IntToStr(++subEquationCount)+" 道"; break; case 2: //乘法 edtEquation->Text=IntToStr(a)+" × "+IntToStr(b)+" ="; rightAnswer=a*b; Label3->Caption="乘法题："+IntToStr(++mulEquationCount)+" 道"; break; case 3: //除法 if(b==0) b=rand()%(numMax-1)+1; rightAnswer=a; a=b*rightAnswer; edtEquation->Text=IntToStr(a)+" ÷ "+IntToStr(b)+" ="; Label4->Caption="除法题："+IntToStr(++divEquationCount)+" 道"; break; } lblTitle->Caption=AnsiString().sprintf("第 %.2d 道题",++total); Edit1->Text=""; Edit1->SetFocus(); lblResult->Caption=""; btnCheck->Enabled=true; } //--------------------------------------------------------------------------- //点击检查按钮 void __fastcall TForm1::btnCheckClick(TObject *Sender) { try { answer=Edit1->Text.ToInt(); if(answer==rightAnswer) { lblResult->Caption="√"; lblRight->Caption="答对题："+IntToStr(++rightAnswerCount)+" 道"; } else { lblResult->Caption="X"; lblWrong->Caption="答错题："+IntToStr(++wrongAnswerCount)+" 道"; } btnCheck->Enabled=false; btnNext->SetFocus(); } catch(...) { ShowMessage("请输入数字"); } } //--------------------------------------------------------------------------- void __fastcall TForm1::FormShow(TObject *Sender) { mnuNew->Click(); //窗体第一次显示时自动点击重新开始菜单 } //--------------------------------------------------------------------------- //点击加法运算菜单项，减法、乘法、除法复用该事件处理函数 void __fastcall TForm1::mnuAddClick(TObject *Sender) { TMenuItem *obj=(TMenuItem *)Sender; obj->Checked=true; //菜单项打勾 tag=obj->Tag; //取菜单项的Tag } //--------------------------------------------------------------------------- //点击退出菜单 void __fastcall TForm1::mnuExitClick(TObject *Sender) { Close(); } //--------------------------------------------------------------------------- //点击关于菜单 void __fastcall TForm1::mnuAboutClick(TObject *Sender) { frmAbout->ShowModal(); } //--------------------------------------------------------------------------- //点击重新开始菜单 void __fastcall TForm1::mnuNewClick(TObject *Sender) { total=0; addEquationCount=0; subEquationCount=0; mulEquationCount=0; divEquationCount=0; rightAnswerCount=0; wrongAnswerCount=0; Label1->Caption="加法题：0 道"; Label2->Caption="减法题：0 道"; Label3->Caption="乘法题：0 道"; Label4->Caption="除法题：0 道"; lblRight->Caption="答对题：0 道"; lblWrong->Caption="答错题：0 道"; btnNext->Click(); //自动点击下一题按钮 } //---------------------------------------------------------------------------