Compilare: user.cpp: In function ‘int check(char*)’: user.cpp:17:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < strlen(s); i++) ^ user.cpp:33:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i < strlen(s) - 2 && s[i] == '.' && s[i+1] == '.' && s[i+2] == '.') ^ user.cpp:74:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘void citire()’: user.cpp:84:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < lungimi.size(); i++) ^