Compilare: user.cpp: In function ‘void ad()’: user.cpp:8:13: warning: unused variable ‘n’ [-Wunused-variable] int max,n,m,i,t=0; ^ user.cpp:8:15: warning: unused variable ‘m’ [-Wunused-variable] int max,n,m,i,t=0; ^ user.cpp: In function ‘int main()’: user.cpp:63:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("euclid4.in","r",stdin); ^ user.cpp:64:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("euclid4.out","w",stdout); ^