0_0_21187454_13321.cpp:20:12: error: macro "CLR" requires 2 arguments, but only 1 given CLR(Mat); ^ 0_0_21187454_13321.cpp: In function 'int Gaussian(int, int)': 0_0_21187454_13321.cpp:20:5: error: 'CLR' was not declared in this scope CLR(Mat); ^