Eroare de compilare: user.cpp:5:1: warning: "Nmax" redefined user.cpp:4:1: warning: this is the location of the previous definition user.cpp:8: error: ‘Mmax’ was not declared in this scope user.cpp: In function ‘int main()’: user.cpp:30: error: ‘Mat’ was not declared in this scope user.cpp:34: error: ‘Mat’ was not declared in this scope user.cpp:39: error: ‘Mat’ was not declared in this scope