factori.cpp: In function 'int main()': factori.cpp:33: warning: format '%d' expects type 'int', but argument 2 has type 'long long int' factori.cpp:15: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result factori.cpp:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result