Compilare: user.cpp: In function ‘int main()’: user.cpp:25:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < line.size(); ++i) { ^ user.cpp:41:53: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < codesize - 1 && i < text.size(); ++i) { ^ user.cpp:45:60: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = codesize - 1; i < codesize && i < text.size(); ++i) { ^ user.cpp:52:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = codesize; i < text.size(); ++i) { ^