The illustration shows some lines of code numbered from 47 through 55 with following annotations:

"using namespace std;
cout.setf(ios::fixed);
cout.setf(ios::showpoint);
cout.precision(1);
cout << fDegrees
<< " degrees Fahrenheit is equivalent to\n"
<< cDegrees << " degrees Celsius.\n";"
"return;" annotated as "This return is optional."
"}"