在MFC中编写的计算器代码.docVIP

在MFC中编写的计算器代码 该计算器支持加、减、乘、除、开平方、求导、清空屏幕和小数等功能 1.在CMyDlg头文件中添加如下代码： class CMyDlg : public CDialog { public: void Calc1(); // 按下数字键 void Calc2(); //按下符号键 protected: char m_sign; //记录按下哪个运算符 int m_numb; //按了哪个数字键 bool point; //是否按下小数点 bool equals;//是否按下等号 bool num;//是否按下数字键 int nums;//运算小数点后数字的值 double number1;//按下运算符之后的数值 double number2;//没按运算符之前的数值 int m_edit;//记录按下的数字键的数值 }； 2.在CMyDlg文件体中添加如下代码： CMyDlg::CMyDlg(CWnd* pParent /*=NULL*/) : CDialog(CMyDlg::IDD, pParent) { number1 = 0; number2 = 0; nums = -1; num = false; point = false; equals = false; m_sign = =; } void CMyDlg::Onsqrt() //开平方 { if(equals)//通过运算符运算之后值 { number1 = sqrt(number1); m_EDIT1.Format(%lg, number1); } else//运算之前的值 { number2 = sqrt(number2); m_EDIT1.Format(%lg, number2); } UpdateData(FALSE); } void CMyDlg::OnReciprocal() //求导 { if(equals) { if(number1 != 0) { number1 = 1 / number1; m_EDIT1.Format(%lg, number1); } else m_EDIT1 = 除数不能为零!; } else { if(number2 != 0) { number2 = 1 / number2; m_EDIT1.Format(%lg, number2); } else m_EDIT1 = 除数不能为零!; } UpdateData(FALSE); } void CMyDlg::On0() //按下数字0 { m_numb = 0; Calc1(); } void CMyDlg::On1() { m_numb = 1; Calc1(); } void CMyDlg::On2() { m_numb = 2; Calc1(); } void CMyDlg::On3() { m_numb = 3; Calc1(); } void CMyDlg::On4() { m_numb = 4; Calc1(); } void CMyDlg::On5() { m_numb = 5; Calc1(); } void CMyDlg::On6() { m_numb = 6; Calc1(); } void CMyDlg::On7() { m_numb = 7; Calc1(); } void CMyDlg::On8() { m_numb = 8; Calc1(); } void CMyDlg::On9() { m_numb = 9; Calc1(); } void CMyDlg::OnAdd() //加法 { Calc2(); m_sign = +; } void CMyDlg::Onc() //清空屏幕 { number1 = 0; number2 = 0; nums = -1; num = false; point = false; equals = false; m_sign = =; m_EDIT1.Format(%lg,number1); UpdateData(FALSE); } void CMyDlg::OnCalc() //按下等于号 { Calc2(); m_sign = =; equals = true; } void CMyDlg::OnDiv() //除法 { Calc2(); m_sign