Compilare: user.cpp: In function ‘void VectorMaking()’: user.cpp:20:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 1; i <= pattern.length() - 1; ) ~~^~~~~~~~~~~~~~~~~~~~~~~ user.cpp: In function ‘void KMP()’: user.cpp:39:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (i <= text.length() - 1 && index < 1000) /* there is a while with 2 conditions first for not exit from the text size and second for positions limit of 1000*/ ~~^~~~~~~~~~~~~~~~~~~~ user.cpp:47:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if ( j == pattern.length()) ~~^~~~~~~~~~~~~~~~~~~