🚀 Micro:bit乒乓球游戏编程教程：激发孩子编程兴趣！

function board() {
for (let i = xb; i < (xb + yb); i++) {
      led.plot(i, 4)
}
}
function left() {
xb += 0 - 1
basic.clearScreen()
board()
ball()
}
function right() {
xb += 1
basic.clearScreen()
board()
ball()
}
function ball() {
led.plot(x, y)
}
function topside() {
ydir = 1
if (x == 0) {
      xdir = Math.random(2)
} else if (x == 4) {
      xdir = Math.random(2) - 1
} else {
      xdir = Math.random(3) - 1
}
}
function leftside() {
xdir = 1
}
function rightside() {
xdir = -1
}
function corners() {
xdir = 0 - xdir
ydir = 0 - ydir
}
function checkhit() {
if (xb - 1 < x && xb + yb > x) {
      scor += 1
      ydir = -1
      if (x == 0) {
         xdir = Math.random(2)
      } else if (x == 4) {
         xdir = Math.random(2) - 1
      } else {
         xdir = Math.random(3) - 1
      }
      if (scor > 1 && scor < 4) {
         yb += 0 - 1
      }
      if (scor > 5 && scor < 12) {
         time += 0 - 150
      }
}
}
function moveball() {
x += xdir
y += ydir
basic.clearScreen()
ball()
board()
if (y == 0 && (x == 0 || x == 4)) {
      corners()
} else if (x == 0 && y > 0 && y < 3) {
      leftside()
} else if (x == 4 && y > 0 && y < 3) {
      rightside()
} else if (y == 0) {
      topside()
} else if (y == 3) {
      checkhit()
} else if (y == 4) {
      gam = false
      basic.clearScreen()
      basic.pause(1000)
      basic.showNumber(scor)
      basic.pause(1000)
      basic.clearScreen()
      if (scor < 12) {
         basic.showIcon(IconNames.Sad)
      } else {
         basic.showIcon(IconNames.Happy)
      }
}
}
input.onButtonPressed(Button.B, () => {
right()
})
input.onButtonPressed(Button.A, () => {
left()
})
basic.forever(() => {
while (gam == true) {
      basic.pause(time)
      moveball()
}
})
let x: number
x = 0
let y: number
y = 0
let xb: number
xb = 0
let yb: number
yb = 0
let xdir: number
xdir = 0
let ydir: number
ydir = 0
let scor: number
scor = 0
let gam: boolean
gam = true
let time: number
time = 1000
xb = 0
yb = 4
board()
x = 2
y = 0
ball()
xdir = 0
ydir = 1

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