Compilare: user.cpp: In function ‘void compPerm(int)’: user.cpp:135:22: warning: variable ‘z’ set but not used [-Wunused-but-set-variable] bool ok = 0, z = 0; ^ user.cpp: In function ‘int main()’: user.cpp:184:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d ", &n, &m); ^ user.cpp: In member function ‘void bigNumber::read()’: user.cpp:98:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s\n", s + 1); ^