c++实践报告

}

}

mark++;

double i=Double::Parse(textBox1->Text); if(i==0) textBox1->Text=\; else textBox1->Text+=7;

//8键 { } //9键 { } //C { } //+/- {

textBox1->Text=\;

if(mark==18) System::Windows::Forms::MessageBox::Show(\超出屏幕范围，禁止 else { }

if(opera==1) {opera=0;textBox1->Text=\;} step[mark]=9; mark++;

double i=Double::Parse(textBox1->Text); if(i==0) textBox1->Text=\; else textBox1->Text+=9;

if(mark==18) System::Windows::Forms::MessageBox::Show(\超出屏幕范围，禁止 else { }

if(opera==1) {opera=0;textBox1->Text=\;} step[mark]=8; mark++;

double i=Double::Parse(textBox1->Text); if(i==0) textBox1->Text=\; else textBox1->Text+=8;

private: System::Void button12_Click(System::Object^ sender, System::EventArgs^ e)

输入\);

private: System::Void button13_Click(System::Object^ sender, System::EventArgs^ e)

输入\);

private: System::Void button8_Click(System::Object^ sender, System::EventArgs^ e)

private: System::Void button9_Click(System::Object^ sender, System::EventArgs^ e)

}

double d=Double::Parse(textBox1->Text); d=0-d;

textBox1->Text=d.ToString();

//平方根 { } //% { } //1/x {

double d=Double::Parse(textBox1->Text);

if(d==0) System::Windows::Forms::MessageBox::Show(\的倒数不存在\); else {

d=1/d;

textBox1->Text=d.ToString(); if(state==9)textBox1->Text=\; else {

opera=1;

value2=Double::Parse(textBox1->Text); switch(state){

case 0:value1=value1+(value1*value2/100); case 1:value1=value1-(value1*value2/100); case 2:value1=value1*(value1*value2/100); case 3:if(value1*value2/100==0)

{ }

else value1=value1/(value1*value2/100);}

System::Windows::Forms::MessageBox::Show(\除数不能为0\); textBox1->Text=\; textBox2->Text=\;

double d=Double::Parse(textBox1->Text);

if(d<0) System::Windows::Forms::MessageBox::Show(\开方数小于0，无效的开方 else d=System::Math::Sqrt(d); textBox1->Text=d.ToString();

private: System::Void button10_Click(System::Object^ sender, System::EventArgs^ e)

数\);

private: System::Void button15_Click(System::Object^ sender, System::EventArgs^ e)

textBox1->Text=value1.ToString();

}

private: System::Void button20_Click(System::Object^ sender, System::EventArgs^ e)

}

}

opera=1;

//加 { } //减 {

if(state==9) { } else {

opera=1;

textBox2->Text=textBox2->Text+textBox1->Text+\; value2=Double::Parse(textBox1->Text); value1=Double::Parse(textBox1->Text); textBox2->Text=textBox1->Text+\; textBox1->Text=\; state=1; if(state==9) { } else { }

opera=1;

textBox2->Text=textBox2->Text+textBox1->Text+\; value2=Double::Parse(textBox1->Text); switch(state){

case 0:value1=value1+value2;break; case 1:value1=value1-value2;break; case 2:value1=value1*value2;break;

case 3:if(value2==0) System::Windows::Forms::MessageBox::Show(\除数

else value1=value1/value2;}

value1=Double::Parse(textBox1->Text); textBox2->Text=textBox1->Text+\; textBox1->Text=\; state=0;

private: System::Void button27_Click(System::Object^ sender, System::EventArgs^ e)

不能为0\);

textBox1->Text=value1.ToString(); state=0;

private: System::Void button24_Click(System::Object^ sender, System::EventArgs^ e)

}

}

switch(state){

case 0:value1=value1+value2;break; case 1:value1=value1-value2;break; case 2:value1=value1*value2;break;

case 3:if(value2==0) System::Windows::Forms::MessageBox::Show(\除数

else value1=value1/value2;}

不能为0\);

textBox1->Text=value1.ToString(); state=1;

//乘 { } //除 {

if(state==9) {

value1=Double::Parse(textBox1->Text); textBox2->Text=textBox1->Text+\; if(state==9) { } else { }

opera=1;

textBox2->Text=textBox2->Text+textBox1->Text+\; value2=Double::Parse(textBox1->Text); switch(state){

case 0:value1=value1+value2;break; case 1:value1=value1-value2;break; case 2:value1=value1*value2;break;

case 3:if(value2==0) System::Windows::Forms::MessageBox::Show(\除数

else value1=value1/value2;}

value1=Double::Parse(textBox1->Text); textBox2->Text=textBox1->Text+\; textBox1->Text=\; state=2;

private: System::Void button19_Click(System::Object^ sender, System::EventArgs^ e)

不能为0\);

textBox1->Text=value1.ToString(); state=2;

private: System::Void button14_Click(System::Object^ sender, System::EventArgs^ e)