Compilare: main.cpp: In function 'int main()': main.cpp:61:9: warning: this 'if' clause does not guard... [-Wmisleading-indentation] if(pi2[i]==n) ^~ main.cpp:63:13: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'if' out<<nr<<'\n'; ^~~