Compilare: user.cpp: In function ‘int main()’: user.cpp:40:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("easylca.in", "r", stdin); ^ user.cpp:41:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("easylca.out", "w", stdout); ^ user.cpp:43:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%i\n", &T); ^ user.cpp:49:20: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets(S + 1); ^ user.cpp:57:23: warning: ‘e’ may be used uninitialized in this function [-Wmaybe-uninitialized] for(int i=e - 1; i >=1; --i) ^ /tmp/cc8mVKHY.o: In function `main': user.cpp:(.text.startup+0xc1): warning: the `gets' function is dangerous and should not be used.