Compilare: main.cpp: In function 'int main()': main.cpp:47:41: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] { freopen("recurenta2.in", "r", stdin); ^ main.cpp:48:43: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("recurenta2.out", "w", stdout); ^ main.cpp:50:55: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d%d%d", &aa, &bb, &cc, &x1, &x2, &n); ^