iraf.net

Mike-Does SPP support case structures? If so, can you give me a simple example of the syntax?Thanks.
-Paul

Are you asking about SPP (the compiled language now shunned by all but the truly enlightened), or CL scripts?In both cases the answer is yes. For SPP the syntax is[code:1:1ead02db37]
switch (int_expr) { SWITCH CASE construct
case int_const_list:
statements
case int_const_list:
statements
default:
statements
}
[/code:1:1ead02db37]Where 'int_expr' would include things like a single character if you wanted to switch over keystrokes.For CL scripts the basic structure is the same but the switch value can be a script variable, a constant, a cursor/keystroke read. or even an expression. It is most often used (by me anyway) to put keystroke interactivity into a script. For example:[code:1:1ead02db37]
switch (ch) {
case "?":
{
print ("you need help")
}
case "t":
{
printf ("something clever here ")
}
default:
print ("Invalid command")
}
[/code:1:1ead02db37]Note that don't need a BREAK statement, the code block executes and doesn't fallthru to the next case the way it does in C.Cheers,
-Mike