Compilare: main.cpp: In function 'int validate(int, unsigned int)': main.cpp:60:59: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if((mask & (1 << i)) == 0 && (q[line] & (1 << i)) == (1 << i)) ~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~ main.cpp:63:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if((mask & (1 << i)) == (1 << i) && (q[line] & (1 << i)) == 0) ~~~~~~~~~~~~~~~~~~^~~~~~~~~~~ main.cpp:65:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(!((mask & (1 << (i + 1))) == (1 << (i + 1)) && (q[line] & (1 << (i + 1))) == 0)) ~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~ main.cpp:68:47: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if((q[line - 1] & (1 << (i + 1))) == (1 << (i + 1)) || (q[line - 1] & (1 << i)) == (1 << i)) ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~ main.cpp:68:93: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if((q[line - 1] & (1 << (i + 1))) == (1 << (i + 1)) || (q[line - 1] & (1 << i)) == (1 << i)) ~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~ main.cpp: In function 'void completeWhateverMask(int)': main.cpp:85:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if((q[line] & (1 << i)) == (1 << i)) ~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~