Compilare: main.cpp: In function 'int main()': main.cpp:9:1: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for (i=1;i<=500;i++) ^~~ main.cpp:12:5: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' ok=1; ^~