Compilare: user.cpp: In member function ‘hugen hugen::operator+=(const hugen&)’: user.cpp:61:16: warning: statement has no effect [-Wunused-value] x[x[0]]-t; ^ user.cpp: In function ‘int main()’: user.cpp:111:9: warning: unused variable ‘n’ [-Wunused-variable] int n; ^ user.cpp:108:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("next.in","r",stdin); ^ user.cpp:109:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("next.out","w",stdout); ^ user.cpp:114:12: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets(s); ^ user.cpp:116:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lld",&d); ^ /tmp/ccDfeF5k.o: In function `main': user.cpp:(.text.startup+0xa1): warning: the `gets' function is dangerous and should not be used.