[feat][examples/cxx] add cxx basic demo

examples/cxx/CMakeLists.txt

@@ -0,0 +1,7 @@
+set(BSP_COMMON_DIR ${CMAKE_SOURCE_DIR}/bsp/bsp_common)
+set(TARGET_REQUIRED_SRCS ${BSP_COMMON_DIR}/platform/cpp_new.cpp)
+set(mains main.cc)
+generate_bin()
+
+
+

examples/cxx/main.cc

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+/**
+ * @file main.c
+ * @brief
+ *
+ * Copyright (c) 2021 Bouffalolab team
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ */
+
+#include "hal_uart.h"
+#include "hal_mtimer.h"
+#include <iostream>
+
+class Shape {
+protected:
+    int width, height;
+
+public:
+    Shape(int a = 0, int b = 0)
+    {
+        width = a;
+        height = b;
+    }
+    virtual int area()
+    {
+        bflb_platform_printf((char*)"this is Shape class area\r\n");
+        return 0;
+    }
+};
+class Rectangle : public Shape {
+public:
+    Rectangle(int a = 0, int b = 0)
+        : Shape(a, b)
+    {
+    }
+    int area()
+    {
+        bflb_platform_printf((char*)"this is Rectangle class area\r\n");
+        return (width * height);
+    }
+};
+class Triangle : public Shape {
+public:
+    Triangle(int a = 0, int b = 0)
+        : Shape(a, b)
+    {
+    }
+    int area()
+    {
+        bflb_platform_printf((char*)"this is Triangle class area\r\n");
+        return (width * height / 2);
+    }
+};
+
+class Box {
+public:
+    Box()
+    {
+        bflb_platform_printf((char*)"Calling the constructor func\r\n");
+    }
+    ~Box()
+    {
+        bflb_platform_printf((char*)"Calling the destructor func\r\n");
+    }
+};
+
+int main(void)
+{
+    uint32_t a=0;
+    bflb_platform_init(0);
+    a = mtimer_get_time_us();
+
+    /*polymorphic test*/
+    Shape *shape;
+    Rectangle rec(10, 7);
+    Triangle tri(10, 5);
+
+    shape = &rec;
+    shape->area();
+
+    shape = &tri;
+    shape->area();
+
+    /*new and delete test*/
+    int **p;
+    int i, j; //p[4][8]
+
+    p = new int *[4];
+    for (i = 0; i < 4; i++) {
+        p[i] = new int[8];
+    }
+
+    for (i = 0; i < 4; i++) {
+        for (j = 0; j < 8; j++) {
+            p[i][j] = j * i;
+        }
+    }
+
+    for (i = 0; i < 4; i++) {
+        for (j = 0; j < 8; j++) {
+            if (j == 0)
+                bflb_platform_printf((char*)"\r\n");
+            bflb_platform_printf("%d ", p[i][j]);
+        }
+    }
+    bflb_platform_printf((char*)"\r\n");
+    for (i = 0; i < 4; i++) {
+        delete[] p[i];
+    }
+    delete[] p;
+
+    Box *myBoxArray = new Box[4];
+
+    delete[] myBoxArray;
+
+    bflb_platform_printf((char*)"box address %d\r\n",myBoxArray);
+
+    BL_CASE_SUCCESS;
+    while (1) {
+        bflb_platform_delay_ms(100);
+    }
+}