#pragma once
namespace VendingMachine {
using namespace System;
using namespace System::ComponentModel;
using namespace System::Collections;
using namespace System::Windows::Forms;
using namespace System::Data;
using namespace System::Drawing;
/// <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()
{
if (components)
{
delete components;
}
}
private: System::Windows::Forms::Label^ label1;
private: System::Windows::Forms::TextBox^ textBox1;
protected:
private: System::Windows::Forms::Button^ button1;
private: System::Windows::Forms::Button^ button2;
private: System::Windows::Forms::Label^ label2;
private: System::Windows::Forms::Label^ label3;
private: System::Windows::Forms::Label^ label4;
private: System::Windows::Forms::Label^ label5;
private: System::Windows::Forms::Label^ label6;
private: System::Windows::Forms::Label^ label7;
private: System::Windows::Forms::TextBox^ textBox2;
private: System::Windows::Forms::TextBox^ textBox3;
private: System::Windows::Forms::TextBox^ textBox4;
private: System::Windows::Forms::TextBox^ textBox5;
private: System::Windows::Forms::TextBox^ textBox6;
private:
/// <summary>
/// Required designer variable.
/// </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>
void InitializeComponent(void)
{
this->label1 = (gcnew System::Windows::Forms::Label());
this->textBox1 = (gcnew System::Windows::Forms::TextBox());
this->button1 = (gcnew System::Windows::Forms::Button());
this->button2 = (gcnew System::Windows::Forms::Button());
this->label2 = (gcnew System::Windows::Forms::Label());
this->label3 = (gcnew System::Windows::Forms::Label());
this->label4 = (gcnew System::Windows::Forms::Label());
this->label5 = (gcnew System::Windows::Forms::Label());
this->label6 = (gcnew System::Windows::Forms::Label());
this->label7 = (gcnew System::Windows::Forms::Label());
this->textBox2 = (gcnew System::Windows::Forms::TextBox());
this->textBox3 = (gcnew System::Windows::Forms::TextBox());
this->textBox4 = (gcnew System::Windows::Forms::TextBox());
this->textBox5 = (gcnew System::Windows::Forms::TextBox());
this->textBox6 = (gcnew System::Windows::Forms::TextBox());
this->SuspendLayout();
//
// label1
//
this->label1->AutoSize = true;
this->label1->Location = System::Drawing::Point(14, 14);
this->label1->Name = L"label1";
this->label1->Size = System::Drawing::Size(153, 13);
this->label1->TabIndex = 0;
this->label1->Text = L"Amount of change (0-99 cents)";
//
// textBox1
//
this->textBox1->Location = System::Drawing::Point(173, 11);
this->textBox1->Name = L"textBox1";
this->textBox1->Size = System::Drawing::Size(95, 20);
this->textBox1->TabIndex = 1;
//
// button1
//
this->button1->Location = System::Drawing::Point(20, 59);
this->button1->Name = L"button1";
this->button1->Size = System::Drawing::Size(60, 28);
this->button1->TabIndex = 2;
this->button1->Text = L"Calculate";
this->button1->UseVisualStyleBackColor = true;
this->button1->Click += gcnew System::EventHandler(this, &Form1::button1_Click);
//
// button2
//
this->button2->Location = System::Drawing::Point(190, 59);
this->button2->Name = L"button2";
this->button2->Size = System::Drawing::Size(63, 28);
this->button2->TabIndex = 3;
this->button2->Text = L"Clear";
this->button2->UseVisualStyleBackColor = true;
//
// label2
//
this->label2->AutoSize = true;
this->label2->Location = System::Drawing::Point(14, 132);
this->label2->Name = L"label2";
this->label2->Size = System::Drawing::Size(99, 13);
this->label2->TabIndex = 4;
this->label2->Text = L"Number of Quarters";
//
// label3
//
this->label3->AutoSize = true;
this->label3->Location = System::Drawing::Point(14, 178);
this->label3->Name = L"label3";
this->label3->Size = System::Drawing::Size(88, 13);
this->label3->TabIndex = 5;
this->label3->Text = L"Number of Dimes";
//
// label4
//
this->label4->AutoSize = true;
this->label4->Location = System::Drawing::Point(14, 218);
this->label4->Name = L"label4";
this->label4->Size = System::Drawing::Size(0, 13);
this->label4->TabIndex = 6;
//
// label5
//
this->label5->AutoSize = true;
this->label5->Location = System::Drawing::Point(14, 215);
this->label5->Name = L"label5";
this->label5->Size = System::Drawing::Size(94, 13);
this->label5->TabIndex = 7;
this->label5->Text = L"Number of Nickels";
//
// label6
//
this->label6->AutoSize = true;
this->label6->Location = System::Drawing::Point(14, 256);
this->label6->Name = L"label6";
this->label6->Size = System::Drawing::Size(96, 13);
this->label6->TabIndex = 8;
this->label6->Text = L"Number of pennies";
//
// label7
//
this->label7->AutoSize = true;
this->label7->Location = System::Drawing::Point(14, 301);
this->label7->Name = L"label7";
this->label7->Size = System::Drawing::Size(59, 13);
this->label7->TabIndex = 9;
this->label7->Text = L"Total coins";
//
// textBox2
//
this->textBox2->Location = System::Drawing::Point(173, 129);
this->textBox2->Name = L"textBox2";
this->textBox2->Size = System::Drawing::Size(95, 20);
this->textBox2->TabIndex = 10;
//
// textBox3
//
this->textBox3->Location = System::Drawing::Point(173, 178);
this->textBox3->Name = L"textBox3";
this->textBox3->Size = System::Drawing::Size(95, 20);
this->textBox3->TabIndex = 11;
//
// textBox4
//
this->textBox4->Location = System::Drawing::Point(173, 215);
this->textBox4->Name = L"textBox4";
this->textBox4->Size = System::Drawing::Size(95, 20);
this->textBox4->TabIndex = 12;
//
// textBox5
//
this->textBox5->Location = System::Drawing::Point(173, 253);
this->textBox5->Name = L"textBox5";
this->textBox5->Size = System::Drawing::Size(95, 20);
this->textBox5->TabIndex = 13;
//
// textBox6
//
this->textBox6->Location = System::Drawing::Point(173, 294);
this->textBox6->Name = L"textBox6";
this->textBox6->Size = System::Drawing::Size(95, 20);
this->textBox6->TabIndex = 14;
//
// Form1
//
this->AutoScaleDimensions = System::Drawing::SizeF(6, 13);
this->AutoScaleMode = System::Windows::Forms::AutoScaleMode::Font;
this->ClientSize = System::Drawing::Size(284, 338);
this->Controls->Add(this->textBox6);
this->Controls->Add(this->textBox5);
this->Controls->Add(this->textBox4);
this->Controls->Add(this->textBox3);
this->Controls->Add(this->textBox2);
this->Controls->Add(this->label7);
this->Controls->Add(this->label6);
this->Controls->Add(this->label5);
this->Controls->Add(this->label4);
this->Controls->Add(this->label3);
this->Controls->Add(this->label2);
this->Controls->Add(this->button2);
this->Controls->Add(this->button1);
this->Controls->Add(this->textBox1);
this->Controls->Add(this->label1);
this->Name = L"Form1";
this->Text = L"Form1";
this->ResumeLayout(false);
this->PerformLayout();
}
#pragma endregion
private: System::Void button1_Click(System::Object^ sender, System::EventArgs^ e) {
// Declare variables
double change, quarters, dimes, nickels, pennies, total_coins;
// Read in data
Double::TryParse(textBox1->Text, change);
Double::TryParse(textBox2->Text, quarters);
Double::TryParse(textBox3->Text, dimes);
Double::TryParse(textBox4->Text, nickels);
Double::TryParse(textBox5->Text, pennies);
问题出在我的代码的过程数据部分
// Process data
change = change; 0 - 99;
textBox1->Text = change.ToString();
MessageBox::Show(change.ToString());
/*error-I-need-a-whole-number ->*/quarters += change / 25;
MessageBox::Show(quarters.ToString());
// current code above gives me an answer of 3.48 when change equals 87
// Display results
textBox6->Text = total_coins.ToString();
textBox2->Text = quarters.ToString();
}
};
}
答案 0 :(得分：2)
通过change = change; 0 - 99;之类的尴尬行，您想要做的就是使用int类型作为数量。
为什么要对这些数量使用double呢？你听说过四分之一或一角钱的分数吗？使它们都为int类型。 （change表示美分，而非美元，因此将其设为int是有意义的。）
如果您使用int，87 / 25将被截断为3个季度，这是您期望的结果。