Programming and Graphics

234 Introduction to C++ Programming and Graphics

,labely // y-axis label

,title1 // first plot label

,title2 // second plot label

,title3 // third plot label

);

//-----------------------------

if(Itry==1)

{

vexit();

goto again;

};

//-----------------------------

swapbuffers();

//--- Check the keyboard:

kbd = char(checkkey());

if(kbd==’q’) exit(1); // quit

if(kbd==’s’)

{

cout << "Press p to print a postscript file" << endl;

cout << " any other key to finish" << endl;

kbd = char(getkey());

}

if(kbd ==’p’)

{

char outfile[1];

cout << " Please enter the name of the postscript file " <<endl;

cin >> outfile;

voutput (outfile);

cout << "Please enter:" << endl << endl;

cout <<" 1 for a black/white plot" << endl;

cout <<" 2 for a black/white plot in portrait" << endl;

cout <<" 3 for a color plot" << endl;

cout <<" 4 for a color plot with background color" << endl;

cout <<" 5 for a color plot in portrait" << endl;

cout <<" 6 for a color plot in portrait with background color" << endl;

short Iplot;

cin >> Iplot;

if(Iplot==1) vnewdev("postscript");

if(Iplot==2) vnewdev("ppostscript");