Compilare: main.cpp: In function 'int main(int, char**)': main.cpp:34:36: warning: format '%f' expects argument of type 'double', but argument 2 has type 'int' [-Wformat=] printf("%.15f\n", 1); ^ main.cpp:20:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("mafia.in", "r", stdin); ^ main.cpp:21:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("mafia.out", "w", stdout); ^