let points=0

let a=[]

let b=[]

let numb=[0,1,2]

let func=numb

let tempn2=[0,1,2]

let inputs=[]

function setup() {

  createCanvas(1200, 750);

  reset=createButton('Gæt')

  reset.mousePressed(resets)

  a.push(round(20*random()-10))

  a.push(round(20*random()-10))

  a.push(round(20*random()-10))

  b.push(round(20*random()-10))

  b.push(round(20*random()-10))

  b.push(round(20*random()-10))

  inputs.push(createInput(''))

  inputs.push(createInput(''))

  inputs.push(createInput(''))

  inputs[0].style('background-color','red')

  inputs[1].style('background-color','green')

  inputs[2].style('background-color','blue')

}

​

function draw() {

  background(220);

  stroke('grey')

  for(let i=1;i<20;i++){

    line(i*width/20,0,i*width/20,height)

    line(0,i*height/20,width,i*height/20)

  }

  strokeWeight(2)

  stroke(0)

  line(width/2,0,width/2,height)

  line(0,height/2,width,height/2)

  strokeWeight(1)

  noStroke()

  text('Point:'+points,10,20)

  fsign=((b[tempn2[0]]<0) ? '-':'+')

  text('f(x)='+a[tempn2[0]]+'x'+str((b[tempn2[0]]<0) ? '':'+')+b[tempn2[0]],width/4-30,height/4-20)

  text('g(x)='+a[tempn2[1]]+'x'+str((b[tempn2[1]]<0) ? '':'+')+b[tempn2[1]],width/4-30,height/4)

  text('h(x)='+a[tempn2[2]]+'x'+str((b[tempn2[2]]<0) ? '':'+')+b[tempn2[2]],width/4-30,height/4+20)

  stroke('red')

  line(0,height/2*(1-b[0]/10)+width/2*a[0],width,height/2*(1-b[0]/10)-width/2*a[0])

  stroke('green')

  line(0,height/2*(1-b[1]/10)+width/2*a[1],width,height/2*(1-b[1]/10)-width/2*a[1])

  stroke('blue')

  line(0,height/2*(1-b[2]/10)+width/2*a[2],width,height/2*(1-b[2]/10)-width/2*a[2])

}

function resets(){

  if(inputs[tempn2[0]].value()=='f'&&inputs[tempn2[1]].value()=='g'&&inputs[tempn2[2]].value()=='h'){

    points++

  }else{points--}

  a[0]=round(20*random()-10)

  a[1]=round(20*random()-10)

  a[2]=round(20*random()-10)

  b[0]=round(20*random()-10)

  b[1]=round(20*random()-10)

  b[2]=round(20*random()-10)

  let tempn=[0,1,2]

  tempn2=[]

  let temp=random([0,1,2])

  tempn.splice(temp,1)

  tempn2.push(temp)

  temp=random([0,1])

  tempn2.push(tempn[temp])

  tempn.splice(temp,1)

  tempn2.push(tempn[0])

  inputs[tempn2[0]].value('')

  inputs[tempn2[1]].value('')

  inputs[tempn2[2]].value('')

}

​