多项式计算器c++实现，Qt界面

#include "mainwindow.h" #include "ui_mainwindow.h" #include <QString> #include "func.cpp" #include <memory> #include <QMessageBox> MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent), ui(new Ui::MainWindow) { ui->setupUi(this); p = true; } MainWindow::~MainWindow() { delete ui; } void MainWindow::addchar(QChar ch) { if (p) { QString str = ui->lineEdit->text(); str = str + ch; ui->lineEdit->setText(str); } else { QString str = ui->lineEdit_2->text(); str = str + ch; ui->lineEdit_2->setText(str); } } void MainWindow::on_pushButton_1_clicked() { addchar('1'); } void MainWindow::on_pushButton_13_clicked() { addchar('.'); } void MainWindow::on_pushButton_2_clicked() { addchar('2'); } void MainWindow::on_pushButton_3_clicked() { addchar('3'); } void MainWindow::on_pushButton_4_clicked() { addchar('4'); } void MainWindow::on_pushButton_5_clicked() { addchar('5'); } void MainWindow::on_pushButton_6_clicked() { addchar('6'); } void MainWindow::on_pushButton_7_clicked() { addchar('7'); } void MainWindow::on_pushButton_8_clicked() { addchar('8'); } void MainWindow::on_pushButton_9_clicked() { addchar('9'); } void MainWindow::on_pushButton_0_clicked() { addchar('0'); } void MainWindow::on_pushButton_10_clicked() { addchar('+'); } void MainWindow::on_pushButton_12_clicked() { addchar('-'); } void MainWindow::on_pushButton_11_clicked() { addchar('x'); addchar('^'); } void MainWindow::on_pushButton_clicked() { p = p^true; if (p) ui->pushButton->setText("单击以输入P2"); else ui->pushButton->setText("单击以输入P1"); } void MainWindow::on_pushButton_14_clicked() { close(); } void MainWindow::on_pushButton_16_clicked() { if(p) { QString str = ui->lineEdit->text(); str = str.left(str.length() - 1); ui->lineEdit->setText(str); } else { QString str = ui->lineEdit_2->text(); str = str.left(str.length() - 1); ui->lineEdit_2->setText(str); } } void MainWindow::on_pushButton_15_clicked() { QString str1 = ui->lineEdit->text(); int l = 0, r = 0, temp2 = 0; double temp1 = 0; Poly P1, P2, Pa, Pm; while(r < str1.length()) { bool g = true; while(str1[r].isDigit()|| str1[r] == '.' ||g&&(str1[r] == '+'||str1[r] == '-')&&r<str1.length()) { g = false; r++; } temp1 = str1.mid(l,r-l).toDouble(); if (str1[r] == 'x') { r += 2; l = r; } else { l = r; P1.insert(temp1, 0); g = true; continue; } g = true; while(str1[r].isDigit()||g&&(str1[r] == '+'||str1[r] == '-')&&r<str1.length()) { if (!g) if (str1[r] == '+'||str1[r] == '-') break; g = false; r++; } temp2 = str1.mid(l,r-l).toInt(); P1.insert (temp1, temp2); l = r; } QString str2 = ui->lineEdit_2->text(); l = 0; r = 0; temp1 = 0; temp2 = 0; while(r < str2.length()) { bool g = true; while(str2[r].isDigit()|| str2[r] == '.' ||g&&(str2[r] == '+'||str2[r] == '-')&&r<str2.length()) { g = false; r++; } temp1 = str2.mid(l,r-l).toDouble(); if (str2[r] == 'x') { r += 2; l = r; } else { l = r; P2.insert(temp1,0); g = true; continue; } g = true; while(str2[r].isDigit()||g&&(str2[r] == '+'||str2[r] == '-')&&r<str2.length()) { if (!g) if (str2[r] == '+'||str2[r] == '-') break; g = false; r++; } temp2 = str2.mid(l,r-l).toInt(); P2.insert(temp1,temp2); l = r; } QString ans1,ans2; Pa = P1 + P2; Pm = P1 - P2; term * pa = Pa.head->pNext, * pm = Pm.head->pNext; bool g = false; if(pa==NULL) ans1=QChar('0'); for (;pa!=NULL;pa=pa->pNext) if (pa->coef != 0) { g = true; if(pa->coef > 0) ans1 = ans1 + QChar('+'); if(pa->coef!=1 && pa->coef!=-1) ans1 = ans1 + QString::number(pa->coef); if(pa->coef == -1) ans1 = ans1 + "-"; if (pa->exp != 0 && pa->exp != 1) ans1 = ans1 + QString("x^") + QString::number(pa->exp); else if (pa->exp == 1) ans1 = ans1 + QString ("x"); else if (pa->exp == 0 && (pa->coef==1 || pa->coef==-1)) ans1 = ans1 + '1'; } if (ans1[0] == '+') ans1 = ans1.right(ans1.length()-1); g = false; if(pm==NULL) ans2=QChar('0'); for (;pm!=NULL;pm=pm->pNext) if (pm->coef != 0) { g = true; if(pm->coef > 0) ans2 = ans2 + QChar('+'); if(pm->coef!=1 && pm->coef!=-1) ans2 = ans2 + QString::number(pm->coef); if(pm->coef == -1) ans2 = ans2 + "-"; if (pm->exp != 0 && pm->exp != 1) ans2 = ans2 + QString("x^") + QString::number(pm->exp); else if (pm->exp == 1) ans2 = ans2 + QString ("x"); else if (pm->exp == 0 && (pm->coef==1 || pm->coef==-1)) ans2 = ans2 + '1'; } if (ans2[0] == '+') ans2 = ans2.right(ans2.length()-1); ui->lineEdit_3->setText(ans1); ui->lineEdit_4->setText(ans2); }