Eroare de compilare: user.cpp:9: error: size of array ‘mat’ is too large user.cpp: In function ‘int main()’: user.cpp:15: error: ‘mat’ was not declared in this scope user.cpp:19: error: ‘mat’ was not declared in this scope user.cpp:21: error: ‘mat’ was not declared in this scope user.cpp:23: error: ‘mat’ was not declared in this scope user.cpp:25: error: ‘mat’ was not declared in this scope user.cpp:30: warning: comparison between signed and unsigned integer expressions