Compilare: user.cpp: In function ‘bool subsir(char*, char*)’: user.cpp:18:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] return k==strlen(x); ^ user.cpp: In function ‘int main()’: user.cpp:36:32: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if(ls>mx || ls==mx && strcmp(s[i],s[ix])<0 ) ^ user.cpp:27:10: warning: unused variable ‘ok’ [-Wunused-variable] bool ok; ^