Compilare: user.cpp: In function ‘int main()’: user.cpp:12:48: warning: unused variable ‘lim’ [-Wunused-variable] int a,b,i,j,x,k=0,e,maxx=0,prod=1,nr=0,nrr,lim; ^ user.cpp:10:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] { freopen("maxd.in", "r",stdin); ^ user.cpp:11:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("maxd.out", "w",stdout); ^ user.cpp:33:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &a, &b); ^