Compilare: main.cpp: In function 'int main()': main.cpp:35:13: warning: this 'if' clause does not guard... [-Wmisleading-indentation] if(pr[j*i]==divi[j*i]) ^~ main.cpp:37:15: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'if' j++; ^ main.cpp:27:16: warning: iteration 999998 invokes undefined behavior [-Waggressive-loop-optimizations] if(pr[i]==0) ~~~~^ main.cpp:25:16: note: within this loop for(i=2;i<=1000000;i++) ~^~~~~~~~~