弱弱问一句c++中两个%什么意思？

Question

#define FILE_ICON "%APPPATH%,1"

%APPPATH% 是指？为什么两边要加上%

Answer 1

This %APPPATH% represents the environment variable of the Windows system, which is used to save the path and has nothing to do with C itself

Answer 2

is just an ordinary string in C .

This string should be used to represent Windows environment variables. Windows environment variables have percent signs at the beginning and end.

Answer 3

The % sign is only useful when formatting with printf, but only one is needed. If you are not formatting a string, just use it as an ordinary character, a raw character, which has no special meaning.

Answer 4

If you want to get the value of a windows environment variable, you need to use the getenv function

const char* pAppPath = getenv("APPPATH");

Answer 5

Variables in Windows system paths are identified by double percent signs. %APPPATH% should be the path to the application.

Answer 6

You can refer to the process of configuring the development environment in Java under win, and you will understand