Compilare: main.cpp: In function 'void add(HugeNumber&, HugeNumber&)': main.cpp:33:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if ( i < B.cif.size() ) ~~^~~~~~~~~~~~~~ main.cpp:37:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if ( i < A.cif.size() ) ~~^~~~~~~~~~~~~~ main.cpp:43:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if ( i < A.cif.size() ) ~~^~~~~~~~~~~~~~ main.cpp: In function 'void substract(HugeNumber&, HugeNumber&)': main.cpp:63:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( int i = 0; i < A.cif.size(); i++ ) ~~^~~~~~~~~~~~~~ main.cpp:67:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if ( i < B.cif.size() ) ~~^~~~~~~~~~~~~~