From baf09008869a1c74f759c72e03225a80ab0465d7 Mon Sep 17 00:00:00 2001
From: Your Name <you@example.com>
Date: Wed, 30 Mar 2022 10:49:36 +0200
Subject: [PATCH] hello_world file

---
 hello_world.cpp | 21 +++++++++++++++++++++
 main.cpp        |  2 ++
 makefile        |  9 ++++++---
 3 files changed, 29 insertions(+), 3 deletions(-)
 create mode 100644 hello_world.cpp

diff --git a/hello_world.cpp b/hello_world.cpp
new file mode 100644
index 0000000..9c701fd
--- /dev/null
+++ b/hello_world.cpp
@@ -0,0 +1,21 @@
+#include "opencv2/opencv.hpp"
+#include "opencv2/highgui/highgui.hpp"
+
+int main() 
+{ 
+ // initialize a matrix of black pixels 
+ cv::Mat img = cv::Mat::zeros(120, 350, CV_8UC3); 
+ 
+ // write text on the image 
+putText(img, “Hello World”, cv::Point(15, 70), cv::FONT_HERSHEY_PLAIN, 3, cv::Scalar(0, 255, 0), 
+4); 
+ 
+// display the image 
+imshow(“Win”, img); 
+ 
+// wait for a key press to exit the program 
+cv::waitKey(0); 
+  
+ return 0; 
+}
+
diff --git a/main.cpp b/main.cpp
index 3e3c2e7..bd68921 100644
--- a/main.cpp
+++ b/main.cpp
@@ -1,5 +1,6 @@
 #include <iostream>
 #include "arithmetic.h"
+#include "opencv/opencv.hpp"
 
 int main()
 {
@@ -7,3 +8,4 @@ int main()
 	std::cout<<"c: "<<add(1,2)<<std::endl;
 	return 0;
 }
+
diff --git a/makefile b/makefile
index dbafced..751412c 100644
--- a/makefile
+++ b/makefile
@@ -1,12 +1,15 @@
-all: main arithmetic
-	g++ main.o arithmetic.o
+all: main arithmetic hello
+	g++ main.o arithmetic.o -L/usr/lib/x86_64-linux-gnu -lopencv_core 
 
 main: main.cpp
-	g++ -c main.cpp
+	g++ -c main.cpp -l/usr/include
 	
 arithmetic: arithmetic.cpp arithmetic.h
 	g++ -c arithmetic.cpp
 	
+hello: hello_world.cpp
+	g++ -c hello_world.cpp -l/usr/include
+
 clean:
 	rm *.o
 	rm a.out