From c4a224fc634d08603e9af1cdab51f129917f4092 Mon Sep 17 00:00:00 2001
From: luhuadong <luhuadong@163.com>
Date: Thu, 3 Nov 2022 01:53:58 +0800
Subject: [PATCH] [cpp] Mix C & C++

---
 cpp/mix_c_cpp/cfunc.c   | 12 ++++++++++++
 cpp/mix_c_cpp/cheader.h | 17 +++++++++++++++++
 cpp/mix_c_cpp/main.cpp  | 15 +++++++++++++++
 cpp/mix_c_cpp/makefile  |  5 +++++
 4 files changed, 49 insertions(+)
 create mode 100644 cpp/mix_c_cpp/cfunc.c
 create mode 100644 cpp/mix_c_cpp/cheader.h
 create mode 100644 cpp/mix_c_cpp/main.cpp
 create mode 100644 cpp/mix_c_cpp/makefile

diff --git a/cpp/mix_c_cpp/cfunc.c b/cpp/mix_c_cpp/cfunc.c
new file mode 100644
index 0000000..a1b465b
--- /dev/null
+++ b/cpp/mix_c_cpp/cfunc.c
@@ -0,0 +1,12 @@
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+int add(int a, int b)
+{
+    return a+b;
+}
+
+#ifdef __cplusplus
+}
+#endif
\ No newline at end of file
diff --git a/cpp/mix_c_cpp/cheader.h b/cpp/mix_c_cpp/cheader.h
new file mode 100644
index 0000000..97a8f27
--- /dev/null
+++ b/cpp/mix_c_cpp/cheader.h
@@ -0,0 +1,17 @@
+#ifndef _C_HEADER_
+#define _C_HEADER_
+ 
+#ifdef __cplusplus
+extern "C" {
+#endif
+ 
+#include <stdio.h>
+#include <stdlib.h>
+
+int add(int a, int b); 
+ 
+#ifdef __cplusplus
+}
+#endif
+
+#endif
\ No newline at end of file
diff --git a/cpp/mix_c_cpp/main.cpp b/cpp/mix_c_cpp/main.cpp
new file mode 100644
index 0000000..b057133
--- /dev/null
+++ b/cpp/mix_c_cpp/main.cpp
@@ -0,0 +1,15 @@
+#include <iostream>
+#include "cheader.h"
+
+using namespace std;
+
+int main(void)
+{
+    int a = 0;
+
+    a = add(2, 3); 
+
+    cout << a << endl;
+
+    return 0;
+}
\ No newline at end of file
diff --git a/cpp/mix_c_cpp/makefile b/cpp/mix_c_cpp/makefile
new file mode 100644
index 0000000..0427ff2
--- /dev/null
+++ b/cpp/mix_c_cpp/makefile
@@ -0,0 +1,5 @@
+CC ?= gcc
+
+all:
+	$(CC) main.cpp cfunc.c -lstdc++
+	g++ main.cpp cfunc.c
\ No newline at end of file