巷道支护例子 如何使用循环语句简化用 fish 语言编程啊！可以提供一个样本：; 安装锚杆sel set link zone_tol 0.05def place_cable1 loop n (1,56)y_d=n * 0.9 - 0.9command; 下帮sel cable begin 3.5,y_d,-34 end 5.5,y_d,-34 nseg 4sel cable begin 3.5,y_d,-35 end 5.5,y_d,-35 nseg 4; 顶板sel cable begin 3.4,y_d,-33.5 end 3.4,y_d,-31.5 nseg 4sel cable begin 2.5,y_d,-33.5 end 2.5,y_d,-31.5 nseg 4sel cable begin 1.6,y_d,-33.5 end 1.6,y_d,-31.5 nseg 4sel cable begin 0.7,y_d,-33.5 end 0.7,y_d,-31.5 nseg 4endcommand endloopend这里的 y_d 就是沿 y 轴方向的一个循环变量
