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mainwindow.cpp
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mainwindow.cpp
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#include "mainwindow.h"
#include "ui_mainwindow.h"
#include "math.h"
double CalcVal = 0.0 ;
bool AddTrigger = false ;
bool MultTrigger = false;
bool DivTrigger = false;
bool SquareTrigger = false;
bool SubTrigger = false;
bool ModTrigger = false;
MainWindow::MainWindow(QWidget *parent)
: QMainWindow(parent)
, ui(new Ui::MainWindow)
{
ui->setupUi(this);
ui->Display->setText(QString::number(CalcVal));
QPushButton *numButton[10];
for(int i = 0;i < 10;i++){
QString butname = "Button"+QString::number(i);
numButton[i] = MainWindow::findChild<QPushButton *>(butname);
connect(numButton[i],SIGNAL(released()),this,SLOT(NumberPressed()));
}
connect(ui->Add,SIGNAL(released()),this,SLOT(MathButtonPressed()));
connect(ui->Subs,SIGNAL(released()),this,SLOT(MathButtonPressed()));
connect(ui->Mult,SIGNAL(released()),this,SLOT(MathButtonPressed()));
connect(ui->Mod,SIGNAL(released()),this,SLOT(MathButtonPressed()));
connect(ui->Square,SIGNAL(released()),this,SLOT(MathButtonPressed()));
connect(ui->Divide,SIGNAL(released()),this,SLOT(MathButtonPressed()));
connect(ui->Equal,SIGNAL(released()),this,SLOT(EqualButton()));
connect(ui->Sign,SIGNAL(released()),this,SLOT(ChangeSign()));
connect(ui->Del,SIGNAL(released()),SLOT(RemoveNumber()));
connect(ui->Dot,SIGNAL(released()),SLOT(AddDot()));
connect(ui->Flush,SIGNAL(released()),SLOT(ClearDisplay()));
}
MainWindow::~MainWindow()
{
delete ui;
}
void MainWindow::FlushDisplay(QString preview){
ui->Memory3->setText(ui->Memory2->text());
ui->Memory2->setText(ui->Memory1->text());
ui->Memory1->setText(preview);
}
void MainWindow::NumberPressed(){
QPushButton *button = (QPushButton *)sender();
QString buttonVal = button->text();
QString displayVal = ui->Display->text();
if(displayVal.toDouble() == 0 || displayVal.toDouble() == 0.0){
ui->Display->setText(buttonVal);
}else{
QString newVal = displayVal + buttonVal;
double newDoubleVal = newVal.toDouble();
ui->Display->setText(QString::number(newDoubleVal,'g',16));
}
}
void MainWindow::MathButtonPressed(){
AddTrigger = false ;
MultTrigger = false;
DivTrigger = false;
SquareTrigger = false;
SubTrigger = false;
ModTrigger = false;
QString displayVal = ui->Display->text();
CalcVal = displayVal.toDouble();
QPushButton *button = (QPushButton *)sender();
QString butVal = button->text();
if(QString::compare(butVal,"÷",Qt::CaseInsensitive) == 0){
DivTrigger = true;
}else if(QString::compare(butVal,"+",Qt::CaseInsensitive) == 0){
AddTrigger = true;
}else if(QString::compare(butVal,"-",Qt::CaseInsensitive) == 0){
SubTrigger = true;
}else if(QString::compare(butVal,"x",Qt::CaseInsensitive) == 0){
MultTrigger = true;
}else if(QString::compare(butVal,"%",Qt::CaseInsensitive) == 0){
ModTrigger = true;
}else if(QString::compare(butVal,"√",Qt::CaseInsensitive) == 0){
SquareTrigger = true;
}
ui->Display->setText("");
}
void MainWindow::EqualButton(){
double solution = 0.0;
QString displayVal = ui->Display->text();
QString Operator;
double dblDisplayVal = displayVal.toDouble();
if(DivTrigger || AddTrigger || SubTrigger || MultTrigger || ModTrigger || SquareTrigger){
if(AddTrigger){
solution = CalcVal + dblDisplayVal;
Operator = '+';
}else if(SubTrigger){
solution = CalcVal - dblDisplayVal;
Operator = '-';
}else if(MultTrigger){
solution = CalcVal * dblDisplayVal;
Operator = 'x';
}else if(DivTrigger){
solution = CalcVal / dblDisplayVal;
Operator = '÷';
}else if(ModTrigger){
solution = int(CalcVal) % int(dblDisplayVal);
Operator = '%';
}else if(SquareTrigger){
solution = sqrt(dblDisplayVal);
}
}
QString OperatorDisplay = QString::number(CalcVal) + " " +Operator+ " " + displayVal + " = " +QString::number(solution);
MainWindow::FlushDisplay(OperatorDisplay);
ui->Display->setText(QString::number(solution));
}
void MainWindow::ChangeSign(){
QString displayVal = ui->Display->text();
QRegExp reg("[-]?[0-9.]*");
if(reg.exactMatch(displayVal)){
double dblDisplayVal = displayVal.toDouble();
double invDblDisplayVal = -1 * dblDisplayVal;
ui->Display->setText(QString::number(invDblDisplayVal));
}
}
void MainWindow::RemoveNumber(){
QString DisplayVal = ui->Display->text();
QString NewDisplayVal = DisplayVal.mid(0,DisplayVal.size()-1);
ui->Display->setText(NewDisplayVal);
}
void MainWindow::AddDot(){
QString DisplayVal = ui->Display->text();
QRegExp reg("[-]?[0-9]*");
if(reg.exactMatch(DisplayVal)){
QString NewDisplayVal = DisplayVal+".";
ui->Display->setText(NewDisplayVal);
}
}
void MainWindow::ClearDisplay(){
ui->Display->setText("");
}