qt版科學計算器
之前做過《vc版科學計算器》，這也是我學vc++時的第乙個大作業，通過科學計算器的開發使用我學到了很多東西，也讓我逐漸喜歡上了程式設計。最近在學習qt，所以將當時在vc下寫過的一些東西在qt下重寫了一遍，其實主要還是與顯示等有關的東西需要重寫，要使用qt的顯示方式，而其他的核心的演算法等都還是使用vc下c++的原始碼。
下面是qt版的執行截圖：
標準版：
科學版：
標頭檔案中變數和槽的宣告：
class calculatorscientific : public qmainwindow
;
訊號和槽的關聯**：
//numberkey
connect(ui->pushbutton_zero, signal(clicked()), this, slot(digitclicked()));
connect(ui->pushbutton_one, signal(clicked()), this, slot(digitclicked()));
connect(ui->pushbutton_two, signal(clicked()), this, slot(digitclicked()));
connect(ui->pushbutton_three, signal(clicked()), this, slot(digitclicked()));
connect(ui->pushbutton_four, signal(clicked()), this, slot(digitclicked()));
connect(ui->pushbutton_five, signal(clicked()), this, slot(digitclicked()));
connect(ui->pushbutton_six, signal(clicked()), this, slot(digitclicked()));
connect(ui->pushbutton_seven, signal(clicked()), this, slot(digitclicked()));
connect(ui->pushbutton_eight, signal(clicked()), this, slot(digitclicked()));
connect(ui->pushbutton_nine, signal(clicked()), this, slot(digitclicked()));
connect(ui->pushbutton_a, signal(clicked()), this, slot(digitclicked()));
connect(ui->pushbutton_b, signal(clicked()), this, slot(digitclicked()));
connect(ui->pushbutton_c, signal(clicked()), this, slot(digitclicked()));
connect(ui->pushbutton_d, signal(clicked()), this, slot(digitclicked()));
connect(ui->pushbutton_e, signal(clicked()), this, slot(digitclicked()));
connect(ui->pushbutton_f, signal(clicked()), this, slot(digitclicked()));
connect(ui->pushbutton_pi, signal(clicked()), this, slot(digitclicked()));
//operatorkey
connect(ui->pushbutton_add, signal(clicked()), this, slot(additiveoperatorclicked()));
connect(ui->pushbutton_sub, signal(clicked()), this, slot(additiveoperatorclicked()));
connect(ui->pushbutton_mul, signal(clicked()), this, slot(multiplicativeoperatorclicked()));
connect(ui->pushbutton_div, signal(clicked()), this, slot(multiplicativeoperatorclicked()));
connect(ui->pushbutton_mod, signal(clicked()), this, slot(additiveoperatorclicked()));
connect(ui->pushbutton_and, signal(clicked()), this, slot(additiveoperatorclicked()));
connect(ui->pushbutton_xor, signal(clicked()), this, slot(additiveoperatorclicked()));
connect(ui->pushbutton_x_y, signal(clicked()), this, slot(additiveoperatorclicked()));
bool calculatorscientific::calculate(double rightoperand, const qstring &pendingoperator)
else if (pendingoperator == tr("-")) else if (pendingoperator == tr("*")) else if (pendingoperator == tr("/")) else if (pendingoperator == tr("%")) else if (pendingoperator == tr("and")) else if (pendingoperator == tr("xor")) else if (pendingoperator == tr("x^y"))
return true;
}
void calculatorscientific::unaryoperatorclicked()
result = sqrt(operand);
} else if (clickedoperator == tr("x^2")) else if (clickedoperator == tr("x^3")) else if (clickedoperator == tr("1/x"))
result = 1.0 / operand;
} else if (clickedoperator == tr("ln"))
result = log(operand);
} else if (clickedoperator == tr("log"))
result = log10(operand);
} else if (clickedoperator == tr("sin")) else if (clickedoperator == tr("sinh")) else if (clickedoperator == tr("cos")) else if (clickedoperator == tr("cosh")) else if (clickedoperator == tr("tan")) else if (clickedoperator == tr("tanh")) else if (clickedoperator == tr("n!"))
result = 1;
for(int i = 1; i <= (int)operand; i++)
result *= i;
} else if (clickedoperator == tr("e^x")) else if (clickedoperator == tr("10^x")) else if (clickedoperator == tr("int")) else if (clickedoperator == tr("not"))
ui->lineedit_display->settext(qstring::number(result));
waitingforoperand = true;
}
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