Compilare: user.cpp: In function ‘int main()’: user.cpp:95:38: 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:96:40: 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:97:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] int q; scanf("%d\n", &q); ^ user.cpp:99:16: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets(s); N = strlen(s); int i; ^ /tmp/ccrnq758.o: In function `main': user.cpp:(.text.startup+0x74): warning: the `gets' function is dangerous and should not be used.