Compilare: main.cpp: In function 'int main()': main.cpp:13:19: warning: unused variable 'j2' [-Wunused-variable] int x,y,t,i,j,j2,pos,cat,b; ^~ main.cpp:13:30: warning: unused variable 'b' [-Wunused-variable] int x,y,t,i,j,j2,pos,cat,b; ^ main.cpp:17:15: warning: iteration 9999 invokes undefined behavior [-Waggressive-loop-optimizations] if(v[i]==0) ~~~^ main.cpp:15:14: note: within this loop for(i=2;i<=10001;i++) ~^~~~~~~ main.cpp:37:25: warning: 'j' may be used uninitialized in this function [-Wmaybe-uninitialized] while(cat>1 && j<=sqrt(cat)) ~^~~~~~~~~~~