我想迭代一组特定的值.下面简单的例子
program Project1; {$APPTYPE CONSOLE} var a,b: word; wait: string; begin a := 0; for b in [1,5,10,20] do begin a := a + 1; writeln('Iteration = ',a,',value = ',b); end; read(wait); end.
迭代= 1,值= 1
迭代= 2,值= 5
迭代= 3,值= 10
迭代= 4,值= 20
现在如果我改变集合的顺序
for b in [20,1] do
实现这一点的最好方法是什么?