Compilare: user.cpp: In function ‘int main()’: user.cpp:41:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &n, &k); ^ user.cpp:43:12: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets(s); ^ /tmp/cc2bCYHQ.o: In function `main': user.cpp:(.text.startup+0x4a): warning: the `gets' function is dangerous and should not be used.