Compilare: user.cpp: In function ‘int main()’: user.cpp:15:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < strlen(str)-1; ++i) ^ user.cpp:17:15: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(str[i] > str[i+1] && str[i+1] < str[i+2]) ^