diff --git a/2_Sing08.pro b/2_Sing08.pro
new file mode 100644
index 0000000..341ceac
--- /dev/null
+++ b/2_Sing08.pro
@@ -0,0 +1,39 @@
+#-------------------------------------------------
+#
+# Project created by QtCreator 2020-02-08T18:10:09
+#
+#-------------------------------------------------
+
+QT += core gui
+
+greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
+
+TARGET = 2_Sing08
+TEMPLATE = app
+
+# The following define makes your compiler emit warnings if you use
+# any feature of Qt which has been marked as deprecated (the exact warnings
+# depend on your compiler). Please consult the documentation of the
+# deprecated API in order to know how to port your code away from it.
+DEFINES += QT_DEPRECATED_WARNINGS
+
+# You can also make your code fail to compile if you use deprecated APIs.
+# In order to do so, uncomment the following line.
+# You can also select to disable deprecated APIs only up to a certain version of Qt.
+#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000 # disables all the APIs deprecated before Qt 6.0.0
+
+CONFIG += c++11
+
+SOURCES += \
+ main.cpp \
+ mainwidget.cpp \
+ subwidget.cpp
+
+HEADERS += \
+ mainwidget.h \
+ subwidget.h
+CONFIG += C++11
+# Default rules for deployment.
+qnx: target.path = /tmp/$${TARGET}/bin
+else: unix:!android: target.path = /opt/$${TARGET}/bin
+!isEmpty(target.path): INSTALLS += target
diff --git a/2_Sing08.pro.user b/2_Sing08.pro.user
new file mode 100644
index 0000000..8fe5938
--- /dev/null
+++ b/2_Sing08.pro.user
@@ -0,0 +1,328 @@
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diff --git a/README.md b/README.md
index 903ccfa..4b5e0fe 100644
--- a/README.md
+++ b/README.md
@@ -1,19 +1 @@
-# practice
-平时练习的代码
-import numpy as np
-import matplotlib.pyplot as plt
-import math
-def draw_heart():
- t=np.linspace(0,math.pi,1000)
- x=np.sin(t)
- y=np.cos(t)+np.power(x,2.0/3)
- plt.plot(x,y,color='red',linewidth=2,label='h')
- plt.plot(-x,y,color='red',linewidth=2,label='h')
- plt.fill_between(x, y, where=(2.310))
- plt.xlabel('t')
- plt.ylabel('h')
- plt.ylim(-2,2)
- plt.xlim(-2,2)
- plt.legend()
- plt.show()
-draw_heart()
+为每日提高自己的练习代码
diff --git a/main.cpp b/main.cpp
new file mode 100644
index 0000000..6f07b28
--- /dev/null
+++ b/main.cpp
@@ -0,0 +1,11 @@
+#include "mainwidget.h"
+#include
+
+int main(int argc, char *argv[])
+{
+ QApplication a(argc, argv);
+ MainWidget w;
+ w.show();
+
+ return a.exec();
+}
diff --git a/mainwidget.cpp b/mainwidget.cpp
new file mode 100644
index 0000000..f013ed3
--- /dev/null
+++ b/mainwidget.cpp
@@ -0,0 +1,53 @@
+#include "mainwidget.h"
+#include
+MainWidget::MainWidget(QWidget *parent)
+ : QWidget(parent)
+{
+
+ b1.setParent(this);
+ b1.setText("close");
+ b1.move(100,100);
+
+ b2 = new QPushButton(this);
+ b2->setText("lalala");
+
+ connect(&b1, &QPushButton::pressed,this,&MainWidget::close);
+
+ connect(b2,&QPushButton::released,this,&MainWidget::mySlot);
+ connect(b2,&QPushButton::released,&b1,&QPushButton::hide);
+
+
+ setWindowTitle("老大");
+ b3.setParent(this);
+ b3.setText("切换到子窗口");
+ b3.move(50,50);
+
+ //w.show();
+
+ //处理子窗口信号
+ connect()
+
+ QPushButton *b5 = new QPushButton(this);
+ b5->setText("Lambbda");
+ int a=1,b=2;
+ connect(b5,&QPushButton::released(),
+ //= 把外部所有局部变量，类中所有成员一值传递 传进变量只读 修改加mutable
+ //& 外部所有局部变量
+ //this 类中所有
+ // （）中可以传参
+ [=]() mutable
+ {
+ b5->setText("fa");
+ qDebug() << "111";
+ })
+
+}
+
+void MainWidget::mySlot()
+{
+ b2->setText("123");
+}
+MainWidget::~MainWidget()
+{
+
+}
diff --git a/mainwidget.h b/mainwidget.h
new file mode 100644
index 0000000..cf95815
--- /dev/null
+++ b/mainwidget.h
@@ -0,0 +1,22 @@
+#ifndef MAINWIDGET_H
+#define MAINWIDGET_H
+
+#include
+#include
+#include "subwidget.h"
+class MainWidget : public QWidget
+{
+ Q_OBJECT
+
+public:
+ MainWidget(QWidget *parent = 0);
+ ~MainWidget();
+ void mySlot();
+private:
+ QPushButton b1;
+ QPushButton *b2;
+ QPushButton b3;
+ subWidget w;
+};
+
+#endif // MAINWIDGET_H
diff --git a/subwidget.cpp b/subwidget.cpp
new file mode 100644
index 0000000..0197c10
--- /dev/null
+++ b/subwidget.cpp
@@ -0,0 +1,15 @@
+#include "subwidget.h"
+
+subWidge::subWidge(QWidget *parent) : QWidget(parent)
+{
+ this->setWindowTitle("xiaodi");
+ b4,setParent(this);
+ b4.setText("切换到主窗口");
+
+ connect(&b4,&QPushButton::clicked,this,&subWidge::sendSlot);
+}
+
+void subWidge::sendSlot()
+{
+ emit mySignal();
+}
diff --git a/subwidget.h b/subwidget.h
new file mode 100644
index 0000000..c46f8de
--- /dev/null
+++ b/subwidget.h
@@ -0,0 +1,23 @@
+#ifndef SUBWIDGE_H
+#define SUBWIDGE_H
+
+#include
+#include
+class subWidge : public QWidget
+{
+ Q_OBJECT
+public:
+ explicit subWidge(QWidget *parent = nullptr);
+ void sendSlot();
+
+signals:
+ /*信号就是函数的声明，只需声明，无需定义*/
+ void mySignal();
+
+public slots:
+
+private:
+ QPushButton b4;
+};
+
+#endif // SUBWIDGE_H