/in/foo.cc: In function 'int main()':
/in/foo.cc:18:4: warning: this 'else' clause does not guard... [-Wmisleading-indentation]
    else 
    ^~~~
/in/foo.cc:20:5: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'else'
     if(p%2==0)
     ^~