Compilare: main.cpp: In member function 'void Matrix::to_one()': main.cpp:2:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] #define FOR(i, j, k) for (int i = j; i < k; ++i) main.cpp:24:7: FOR(i, 0, at.size()) ~~~~~~~~~~~~~~~ main.cpp:24:3: note: in expansion of macro 'FOR' FOR(i, 0, at.size()) ^~~ main.cpp:2:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] #define FOR(i, j, k) for (int i = j; i < k; ++i) main.cpp:25:8: FOR(j, 0, at.size()) ~~~~~~~~~~~~~~~ main.cpp:25:4: note: in expansion of macro 'FOR' FOR(j, 0, at.size()) ^~~ main.cpp: In member function 'void Matrix::to_zero()': main.cpp:2:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] #define FOR(i, j, k) for (int i = j; i < k; ++i) main.cpp:29:7: FOR(i, 0, at.size()) ~~~~~~~~~~~~~~~ main.cpp:29:3: note: in expansion of macro 'FOR' FOR(i, 0, at.size()) ^~~ main.cpp:2:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] #define FOR(i, j, k) for (int i = j; i < k; ++i) main.cpp:30:8: FOR(j, 0, at.size()) ~~~~~~~~~~~~~~~ main.cpp:30:4: note: in expansion of macro 'FOR' FOR(j, 0, at.size()) ^~~ main.cpp: In member function 'Matrix Matrix::operator*(Matrix)': main.cpp:2:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] #define FOR(i, j, k) for (int i = j; i < k; ++i) main.cpp:36:7: FOR(i, 0, at.size()) ~~~~~~~~~~~~~~~ main.cpp:36:3: note: in expansion of macro 'FOR' FOR(i, 0, at.size()) ^~~ main.cpp:2:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] #define FOR(i, j, k) for (int i = j; i < k; ++i)