懒得分了，反正就这样

Matlab/lab1.m

@@ -0,0 +1,55 @@
+figure(1);
+syms x;
+t=-5:0.0001:5;
+fx=heaviside(x+2)-heaviside(x-2);
+ezplot(fx,[-5,5]);
+
+figure(2);
+fy=heaviside(x+0.2)-heaviside(x-0.2);
+ezplot(fy,[-5,5]);
+
+figure(3);
+fz=heaviside(x+0.1)-heaviside(x-0.1);
+ezplot(fz,[-5,5]);
+
+figure(4);
+subplot(2,1,1);
+fa=5*cos(12*pi*t)+6*cos(18*pi*t);
+plot(t,fa);
+
+subplot(2,1,2);
+xcorr1=autocorr(fa,t);
+plot(corr1);
+
+figure(5);
+fb=(cos(2*pi*t)).*(cos(2*pi*t));
+plot(t,fb);
+
+figure(6);
+t = 0:0.1:10;
+b1=[1,5,6];
+a1=[1,5];
+sys=tf(a1,b1);
+y1=step(sys,t);
+a2=[1,5];
+b2=[1,2,5];
+sys=tf(a2,b2);
+y2=step(sys,t);
+a3=[1.5];
+b3=[1,2,1];
+sys=tf(a3,b3);
+y3=step(sys,t);
+plot(t,y1,t,y2,'--',t,y3,'+');
+
+figure(7);
+sys=tf([1,2],[1,3,2]);
+y=impulse(sys,t);
+plot(t,y);
+
+f=cos(t);
+sys=tf([-1,2],[1,3,2]);
+y=lsim(sys,f,t);
+plot(t,f);
+
+
+

SoftwareDesign/Lab2/Lab2-3_Calculator4490_v3/mainwindow.cpp

@@ -119,41 +119,8 @@ void MainWindow::keyPressEvent(QKeyEvent *event) {
   case Qt::Key_7:
     emit ui->digitBtn7->clicked();
     break;
-  case Qt::Key_8:
-    emit ui->digitBtn8->clicked();
-    break;
-  case Qt::Key_9:
-    emit ui->digitBtn9->clicked();
-    break;
-  case Qt::Key_Plus:
-    emit ui->addBtn->clicked();
-    break;
-  case Qt::Key_Minus:
-    emit ui->subtractionBtn->clicked();
-    break;
-  case Qt::Key_Asterisk:
-    emit ui->mulBtn->clicked();
-    break;
-  case Qt::Key_Slash:
-    emit ui->divisionBtn->clicked();
-    break;
-  case Qt::Key_Period:
-    emit ui->pointBtn->clicked();
-    break;
-  case Qt::Key_Equal:
-    emit ui->equalBtn->clicked();
-  case Qt::Key_Backspace:
-    emit ui->clearBtn->clicked();
-    break;
-  case Qt::Key_Delete:
-    emit ui->clearAllBtn->clicked();
-    break;
-  case Qt::Key_Enter:
-    emit ui->equalBtn->clicked();
-    break;
-  case Qt::Key_Escape:
-    emit ui->clearAllBtn->clicked();
-    break;
+  case Qt::Key_8: 
+  
   default:
     break;
   }