// Code derived from Stroustrup's PPP2 book// § 3.7 Names// -beginning on p 75#include<iostream>usingstd::cout;intmain(){intx=1;intnumber_of_elements=1;intFourier_transform=1;intz2=1;intPolygon=1;cout<<x<<'\n'// output above variable values to console...<<number_of_elements<<'\n'//<<Fourier_transform<<'\n'//<<z2<<'\n'//<<Polygon<<'\n';// int 2x; // a name must start with a letter// int time$to$market; // $ is not a letter, digit, or underscore// int Start menu; // space is not a letter, digit, or underscore}