fix: readme using cmake

README.md

@@ -60,13 +60,9 @@ Convert TNT output tree file without tags and taxname, e.g. `winclada.tre` produ
 ### Linux & Unix
 
 ```
-g++ tnt2winclada.cpp -o tnt2winclada
-```
-
-or
-
-```
-clang++ -o tnt2winclada tnt2winclada.cpp
+mkdir -p build && cd build
+cmake ..
+make && make install
 ```
 
 ### Windows
@@ -82,3 +78,22 @@ tnt2winclada -i ${input_file} -o ${output_file}
 ```
 
 Interactive commands are also available.
+
+```
+tnt2winclada
+
+~|~|\ |~|~  ~)  |    |o._ |~| _  _| _ 
+ | | \| |   /_   \/\/ || ||_|(_|(_|(_|
+TNT2WinClada
+MIT, Guoyi Zhang, 2023
+please type help to see more commands
+
+tnt2winclada> help
+help			show interactive commands help
+input <filename>	input a TNT output tree from the specified file
+output <filename>	output a winclada accessible tree file
+quit			quit the program
+exit			exit the program
+
+tnt2winclada>
+```