Compilare: main.cpp: In function 'int main()': main.cpp:11:9: warning: unused variable 'n' [-Wunused-variable] int n,i,j,nr,k,t,aux,afi,st,dr,mij; ^ main.cpp:11:22: warning: unused variable 'aux' [-Wunused-variable] int n,i,j,nr,k,t,aux,afi,st,dr,mij; ^~~ main.cpp:9:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("divprim.in","r",stdin); ^ main.cpp:10:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("divprim.out","w",stdout); ^ main.cpp:41:24: warning: 'afi' may be used uninitialized in this function [-Wmaybe-uninitialized] cout<<afi<<'\n'; ^~~~