Compilare: user.cpp: In function 'void lee(int, int)': user.cpp:76: warning: comparison between signed and unsigned integer expressions user.cpp:89: warning: comparison between signed and unsigned integer expressions user.cpp: In function 'void scriere()': user.cpp:106: warning: comparison between signed and unsigned integer expressions user.cpp:130: warning: comparison between signed and unsigned integer expressions user.cpp:111: warning: 'x_max' is used uninitialized in this function user.cpp:111: warning: 'y_max' is used uninitialized in this function