hello_world file 2

hello_world.cpp

@@ -7,11 +7,11 @@ int main()
  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), 
+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); 
+imshow("Win", img); 
  
 // wait for a key press to exit the program 
 cv::waitKey(0); 

main.cpp

@@ -1,6 +1,6 @@
 #include <iostream>
 #include "arithmetic.h"
-#include "opencv/opencv.hpp"
+#include "opencv2/opencv.hpp"
 
 int main()
 {

makefile

@@ -2,13 +2,13 @@ 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 -l/usr/include
+	g++ -c main.cpp -I/usr/include/opencv4
 	
 arithmetic: arithmetic.cpp arithmetic.h
 	g++ -c arithmetic.cpp
 	
 hello: hello_world.cpp
-	g++ -c hello_world.cpp -l/usr/include
+	g++ -c hello_world.cpp -I/usr/include/opencv4
 
 clean:
 	rm *.o