Compilare: user.cpp: In function ‘int main()’: user.cpp:13:37: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] int N, M; scanf("%d%d ", &N, &M); ^ user.cpp:16:36: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] char word[1000]; gets(word); printf("%s\n", word); ^ user.cpp:17:44: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] int useless; scanf("%d ", &useless); ^ /tmp/cc5WG0jR.o: In function `main': user.cpp:(.text.startup+0x5c): warning: the `gets' function is dangerous and should not be used.