Compilare: user.cpp: In function ‘int main()’: user.cpp:29:27: warning: variable ‘multiplier’ set but not used [-Wunused-but-set-variable] for (register int i=1,multiplier=1; i<=imax; ++i,multiplier=1) { ^ user.cpp:18:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("mins.in","r",stdin); ^ user.cpp:19:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("mins.out","w",stdout); ^ user.cpp:21:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&imax,&jmax); ^