如何在p5.js中显示计算器的运行情况

问题描述 投票：1回答：1

我正在使用p5.js创建一个计算器。我已经让它正常运行。我想让它显示整个数字句子，比如1+1，但是当你点击'='时，它应该删除这个数字句子，只显示答案。有没有人知道如何使这成为可能。非常感谢大家的帮助。非常感谢愿意帮助的人。

let number = 0;
let number1 = 0;
let operation = "";

function setup() {
  createCanvas(400, 400);
  let one = createButton('1');
  one.mousePressed(clickedOne);
  let two = createButton('2');
  two.mousePressed(clickedTwo);
  let three = createButton('3');
  three.mousePressed(clickedThree);
  let four = createButton('4');
  four.mousePressed(clickedFour);
  let five = createButton('5');
  five.mousePressed(clickedFive);
  let six = createButton('6');
  six.mousePressed(clickedSix);
  let seven = createButton('7');
  seven.mousePressed(clickedSeven);
  let eight = createButton('8');
  eight.mousePressed(clickedEight);
  let nine = createButton('9');
  nine.mousePressed(clickedNine);
  let zero = createButton('0');
  zero.mousePressed(clickedZero);
  let equals = createButton('=');
  equals.mousePressed(pressedEquals);
  let clear = createButton('AC');
  clear.mousePressed(clickedClear);
  let divide = createButton('÷');
  divide.mousePressed(clickedDivide);
  let multiply = createButton('x');
  multiply.mousePressed(clickedMultiply);
  let add = createButton('+');
  add.mousePressed(clickedAdd);
  let minus = createButton('-');
  minus.mousePressed(clickedMinus);
  one.position(100, 150);
  one.size(45, 45);
  two.position(144, 150);
  two.size(45, 45);
  four.position(100, 194);
  four.size(45, 45);
  six.position(188, 194);
  six.size(45, 45);
  three.position(188, 150);
  three.size(45, 45);
  five.position(144, 194);
  five.size(45, 45);
  seven.position(100, 238);
  seven.size(45, 45);
  eight.position(144, 238);
  eight.size(45, 45);
  nine.position(188, 238);
  nine.size(45, 45);
  zero.position(100, 282);
  zero.size(89, 45);
  equals.position(188, 282);
  equals.size(45, 45);
  divide.position(232, 150);
  divide.size(45, 45);
  multiply.position(232, 194);
  multiply.size(45, 45);
  add.position(232, 238);
  add.size(45, 45);
  minus.position(232, 282);
  minus.size(45, 45);
  clear.position(100, 106);
  clear.size(177, 45);

}

function clickedOne() {
  number = number * 10 + 1;
}

function clickedTwo() {
  number = number * 10 + 2;
}

function clickedThree() {
  number = number * 10 + 3;
}

function clickedFour() {
  number = number * 10 + 4;
}

function clickedFive() {
  number = number * 10 + 5;
}

function clickedSix() {
  number = number * 10 + 6;
}

function clickedSeven() {
  number = number * 10 + 7;
}

function clickedEight() {
  number = number * 10 + 8;
}

function clickedNine() {
  number = number * 10 + 9;
}

function clickedZero() {
  number = number * 10 + 0;
}

function clickedDivide() {
  number1 = number;
  number = 0;
  operation = "÷";
}

function clickedMultiply() {
  number1 = number;
  number = 0;
  operation = "x";
}

function clickedAdd() {
  number1 = number;
  number = 0;
  operation = "+";
}

function clickedMinus() {
  number1 = number;
  number = 0;
  operation = "-";
}

function clickedClear() {
  number = 0;
}

function pressedEquals() {
  if (operation === "+") {
        number = number1 + number;
    } else if (operation === "-") {
        number = number1 - number;
    } else if (operation === "x") {
        number = number1 * number
    } if (operation === "÷") {
        number = number1 / number
    }
}

function draw() {
  background(220);
  noStroke();
  fill(20, 255, 255, 30);
  rect(100, 53, 177, 54, 5);
  strokeWeight(6);
  stroke(0);
  noFill();
  rect(97, 50, 183, 280, 5);
  strokeWeight(1);
  stroke(0);
  fill(0);
  textSize(25);

  text(number, 110, 100);
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/p5.js/1.0.0/p5.min.js"></script>
javascript processing p5.js
1个回答
1
投票

重置操作时 = 按下。

function clickedEquals(){
    if (operation == "+") {
        number = number1 + number;
    } else if (operation == "-") {
        number = number1 - number;
    } else if (operation == "x") {
        number = number1 * number;
    } else if (operation == "÷") {
        number = number1 / number;
    }

    operation = ""; // <--- reset
}

连接显示的文字 number1, operation 和 number，如果 operation 不是空的。

function draw() {
    // [...]

    if (operation != "") {
        let display = number1 + " " + operation + " " + number
        text(display, 110, 100);
    } else {
        text(number, 110, 100);
    }
}

请看这个例子。

let number1 = 0;    
let number = 0;
let operation = "";
function setup() {
  createCanvas(400, 400);
  let one = createButton('1');
  one.mousePressed(clickedOne);
  let two = createButton('2');
  two.mousePressed(clickedTwo);
  let three = createButton('3');
  three.mousePressed(clickedThree);
  let four = createButton('4');
  four.mousePressed(clickedFour);
  let five = createButton('5');
  five.mousePressed(clickedFive);
  let six = createButton('6');
  six.mousePressed(clickedSix);
  let seven = createButton('7');
  seven.mousePressed(clickedSeven);
  let eight = createButton('8');
  eight.mousePressed(clickedEight);
  let nine = createButton('9');
  nine.mousePressed(clickedNine);
  let zero = createButton('0');
  zero.mousePressed(clickedZero);
  let equals = createButton('=');
  equals.mousePressed(clickedEquals);
  let clear = createButton('AC');
  let divide = createButton('÷');
  divide.mousePressed(clickedDivide);
  let multiply = createButton('x');
  multiply.mousePressed(clickedMultiply);
  let add = createButton('+');
  add.mousePressed(clickedAdd);
  let minus = createButton('-');
  minus.mousePressed(clickedMinus);
  one.position(100, 150);
  one.size(45, 45);
  two.position(144, 150);
  two.size(45, 45);
  four.position(100, 194);
  four.size(45, 45);
  six.position(188, 194);
  six.size(45, 45);
  three.position(188, 150);
  three.size(45, 45);
  five.position(144, 194);
  five.size(45, 45);
  seven.position(100, 238);
  seven.size(45, 45);
  eight.position(144, 238);
  eight.size(45, 45);
  nine.position(188, 238);
  nine.size(45, 45);
  zero.position(100, 282);
  zero.size(89, 45);
  equals.position(188, 282);
  equals.size(45, 45);
  divide.position(232, 150);
  divide.size(45, 45);
  multiply.position(232, 194);
  multiply.size(45, 45);
  add.position(232, 238);
  add.size(45, 45);
  minus.position(232, 282);
  minus.size(45, 45);
  clear.position(100, 106);
  clear.size(177, 45);

}

function clickedOne(){
  number = number * 10 + 1;
}

function clickedTwo(){
  number = number * 10 + 2;
}

function clickedThree(){
  number = number * 10 + 3;
}

function clickedFour(){
  number = number * 10 + 4;
}

function clickedFive(){
  number = number * 10 + 5;
}

function clickedSix(){
  number = number * 10 + 6;
}

function clickedSeven(){
  number = number * 10 + 7;
}

function clickedEight(){
  number = number * 10 + 8;
}

function clickedNine(){
  number = number * 10 + 9;
}

function clickedZero(){
  number = numer * 10 + 0;
}

function clickedAdd(){ 
    number1 = number;
    number = 0;
    operation = "+";
}

function clickedMinus(){ 
    number1 = number;
    number = 0;
    operation = "-";
}

function clickedMultiply(){ 
    number1 = number;
    number = 0;
    operation = "x";
}

function clickedDivide(){ 
    number1 = number;
    number = 0;
    operation = "÷";
}

function clickedEquals(){
    if (operation == "+") {
        number = number1 + number;
    } else if (operation == "-") {
        number = number1 - number;
    } else if (operation == "x") {
        number = number1 * number;
    } else if (operation == "÷") {
        number = number1 / number;
    }
    operation = "";
}

function draw() {
    background(220);
    noStroke();
    fill(20, 255, 255, 30);
    rect(100, 53, 177, 54, 5);
    strokeWeight(6);
    stroke(0);
    noFill();
    rect(97, 50, 183, 280, 5);
    strokeWeight(1);
    stroke(0);
    fill(0);
    textSize(25);

    if (operation != "") {
        let display = number1 + " " + operation + " " + number
        text(display, 110, 100);
    } else {
        text(number, 110, 100);
    }
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/p5.js/1.0.0/p5.min.js"></script>
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