Recently started using vsCode, in use process, sometimes defined variables will suddenly become gray, such as the figure in the code below, in defining a string variable color before res is normal, but after defined the local variable becomes gray, and even delete the string res, the definition of color, but never go back, should not grammatical problem, you can compile the code also have this problem, we have encountered such a situation, can help solve, thank you ~
The second picture is the file directory structure, file problem the configuration files in the folder and other several configuration file folder is the same, have this a few configuration files in the folder as can compile, can run the program