Compilare: main.cpp: In function 'int main()': main.cpp:26:10: warning: iteration 1999999 invokes undefined behavior [-Waggressive-loop-optimizations] er[i]=true; ~~~~~^~~~~ main.cpp:25:17: note: within this loop for(int i=1;i<=pmax;i++) ^ main.cpp: In function 'int ciur(int)': main.cpp:20:12: warning: 'kp' may be used uninitialized in this function [-Wmaybe-uninitialized] return kp; ^~ main.cpp: In function 'int main()': main.cpp:28:11: warning: 'kp' may be used uninitialized in this function [-Wmaybe-uninitialized] out<<p*p; ^