Compilare: user.cpp: In function ‘int main()’: user.cpp:5:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("tabela.in","r",stdin); ^ user.cpp:6:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("tabela.out","w",stdout); ^ user.cpp:7:5: warning: ‘p1’ is used uninitialized in this function [-Wuninitialized] if(p1==1) printf("%d\n",p2); ^ user.cpp:8:10: warning: ‘p2’ may be used uninitialized in this function [-Wmaybe-uninitialized] else if(p2==1) printf("%d\n",p1); ^