编辑代码

func turn(direction:String) {
    let (row,col,status) = findMonkey()
    if direction == "left" {
        switch status {
            case "up":
            group[row*cols+col] = "<"
            case "down":
            group[row*cols+col] = ">"
            case "left":
            group[row*cols+col] = "v"
            case "right":
            group[row*cols+col] = "^"
            default:
            print()
        }
    }
    else if direction=="right" {
        print(row,col,status)
        switch status {
            case "up":
            group[row*cols+col] = ">"
            case "down":
            group[row*cols+col] = "<"
            case "left":
            group[row*cols+col] = "^"
            case "right":
            group[row*cols+col] = "v"
            default:
            print()
        }
    }
}