Compilare: user.cpp: In function ‘int calc(int, int)’: user.cpp:81:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:84:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("evaluare.in","r",stdin); ^ user.cpp:85:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("evaluare.out","w",stdout); ^ user.cpp: In function ‘int calc(int, int)’: user.cpp:68:48: warning: ‘poz’ may be used uninitialized in this function [-Wmaybe-uninitialized] return calc(st,poz-1)*calc(poz+1,dr); ^