Compilare: main.cpp: In function 'int main()': main.cpp:24:3: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for( i=2; i<=n; i++) ^~~ main.cpp:27:5: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' cout << nr; ^~~~