Compilare: user.cpp: In member function ‘Big& Big::operator*(int&)’: user.cpp:35:13: warning: reference to local variable ‘P’ returned [-Wreturn-local-addr] Big P; ^ user.cpp: In member function ‘Big Big::printNumb()’: user.cpp:46:5: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In member function ‘Big& Big::operator+(Big&)’: user.cpp:51:13: warning: reference to local variable ‘S’ returned [-Wreturn-local-addr] Big S; ^ user.cpp: In function ‘void read()’: user.cpp:108:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp:110:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &m[i]); ^ user.cpp:112:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &p[i]); ^ user.cpp: In function ‘int main()’: user.cpp:140:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("perm3.in", "r", stdin); ^ user.cpp:141:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("perm3.out", "w", stdout); ^