mainwindow.cpp - changes to avoid warnings

mainwindow.cpp

 #include "mainwindow.h"
 #include "ui_mainwindow.h"
 #include <QMessageBox>
+#include <cmath>
 
 MainWindow::MainWindow(QWidget *parent) :
     QMainWindow(parent),
     delete scene;
 }
 
+
 void MainWindow::quadraticFormulaCheck()
 {
     // float firstX;
-    float resultFromFunction;
+    double resultFromFunction;
     bool pass = true;
-    float values[] = {357 , -1000 , 698 , 1.4804781099 , 748 , -392 , 51 , 0.28391805554 ,
+    double values[] = {357 , -1000 , 698 , 1.4804781099 , 748 , -392 , 51 , 0.28391805554 ,
         689 , -689 , 172 , 0.519048482944 , 90 , 521 , 751 , -2.71178575308 , 5 , 107 ,
         465 , -6.0642692054 , 1609 , -983 , 150 , 0.314734649792 , 273 , 496 , 224 ,
         -0.839700867988 , 2 , 91 , 920 , -15.1630045473 , 48 , 300 , 463 , -2.77889067238 ,
         852 , 907 , 241 , -0.510947439149};
 
-    float valuesForMinus[] = {129 , -486 , 456 , 1.76744186047 , 384 , 980 , 625 , -1.30208333333 ,
+    double valuesForMinus[] = {129 , -486 , 456 , 1.76744186047 , 384 , 980 , 625 , -1.30208333333 ,
         270 , -904 , 755 , 1.59515823795 , 67 , -450 , 752 , 3.12650485528 , 98 , 506 , 651 ,
         -2.72985550047 , 38 , -373 , 901 , 4.29396930804 , 273 , -282 , 72 , 0.461538461538 ,
         225 , -889 , 874 , 1.84 , 8 , 136 , 522 , -11.1457513111 , 5 , 77 , 214 , -11.760788100};
 
-    float a, b, c, expected;
+    double a, b, c, expected;
 
     //Verifying if the equation written by the student is correct
     for (int i = 0; i < 40 && pass; i+=4){
 
         resultFromFunction = frogger->QuadraticPlus(a,b,c);
 
-        if( abs(resultFromFunction - expected) > 0.00001) {
+        if( fabs(resultFromFunction - expected) > 0.00001) {
             pass = false;
         }
     }
 
         resultFromFunction = frogger->QuadraticMinus(a,b,c);
 
-        if( abs(resultFromFunction - expected) > 0.00001) {
+        if( fabs(resultFromFunction - expected) > 0.00001) {
             pass = false;
         }
     }
     frogger->reset();
 }
 
-void MainWindow::on_alineEdit_textChanged(const QString &arg1)
+void MainWindow::on_alineEdit_textChanged(const QString &)
 {
     if(ui->alineEdit->text() != "" && ui->blineEdit->text() != "" && ui->clineEdit->text() != "" ){
         ui->RunPushButton->setEnabled(true);
     }
 }
 
-void MainWindow::on_blineEdit_textChanged(const QString &arg1)
+void MainWindow::on_blineEdit_textChanged(const QString &)
 {
     if(ui->alineEdit->text() != "" && ui->blineEdit->text() != "" && ui->clineEdit->text() != "" ){
         ui->RunPushButton->setEnabled(true);
     }
 }
 
-
-
-void MainWindow::on_clineEdit_textChanged(const QString &arg1)
+void MainWindow::on_clineEdit_textChanged(const QString &)
 {
     if(ui->alineEdit->text() != "" && ui->blineEdit->text() != "" && ui->clineEdit->text() != "" ){
         ui->RunPushButton->setEnabled(true);