JavaScript調試三角形的質心

我正在嘗試創建一個腳本，該腳本可以找到給定三個頂點的三角形的質心（並顯示工作）。我創建了這個，但是出來的答案是隨機的或「NaN」。請幫助調試。JavaScript調試三角形的質心

var question = prompt("What do you want to know?") 

if (question === "centroid of triangle") { 
var Ax = prompt("What is the x value of point A on the triangle") 
var Ay = prompt("What is the y value of point A on the triangle") 
var Bx = prompt("What is the x value of point B on the triangle") 
var By = prompt("What is the y value of point B on the triangle") 
var Cx = prompt("What is the x value of point C on the triangle") 
var Cy = prompt("What is the y value of point C on the triangle") 


var MidpointABx = Ax + Bx/2 
var MidpointABy = Ay + By/2 
var SlopeDC = (MidpointABy - Cy)/(MidpointABx - Cx) 
var InterceptDC = Cy - (SlopeDC * Cx) 


var MidpointACx = Ax + Cx/2 
var MidpointACy = Ay + Cy/2 
var SlopeEB = (MidpointACy - By)/(MidpointACx - Bx) 
var InterceptEB = By - (SlopeEB * Bx) 

console.log("A: (" + Ax + "," + Ay + ")") 
console.log("B: (" + Bx + "," + By + ")") 
console.log("C: (" + Cx + "," + Cy + ")") 

console.log("Midpoint of AB (Point D): (" + Ax + "+" + Bx + "/2 , " + Ay + "+" + By + "/2)") 
console.log("Midpoint of AB (Point D): (" + MidpointABx + "," + MidpointABy + ")") 
console.log("Slope of DC: " + MidpointABy + "-" + Cy + "/" + MidpointABx + "-" + Cx) 
console.log("Slope of DC: " + SlopeDC) 
console.log("y-intercept of DC: " + Cy + " = " + SlopeDC + "*" + Cx + "+b") 
console.log("y-intercept of DC: " + InterceptDC) 
console.log("Line DC: y = " + SlopeDC + " * x + " + InterceptDC) 


console.log("Midpoint of AC (Point E): (" + Ax + "+" + Cx + "/2 , " + Ay + "+" + Cy + "/2)") 
    console.log("Midpoint of AC (Point E): (" + MidpointACx + "," + MidpointACy + ")") 
    console.log("Slope of EB: " + MidpointACy + "-" + By + "/" + MidpointACx + "-" +Bx) 
    console.log("Slope of EB: " + SlopeEB) 
    console.log("y-intercept of EB: " + By + " = " + SlopeEB + "*" + Bx + "+b") 
    console.log("y-intercept of EB: " + InterceptEB) 
    console.log("Line EB: y = " + SlopeEB + " * x + " + InterceptEB)

}所以你必須將其轉換成一個像這樣的整數

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2016-01-15 Tae Rugh

哪裏錯誤發生？我在Chrome，IE和Firefox上嘗試了這一點。它在所有三個都沒有NaN錯誤。 –

迅速返回字符串格式的數據：

parseInt(prompt("enter x value"))

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2016-01-15 01:21:37

非常感謝你@Moshe Rabaev。它現在有效！ –

好的很高興提供幫助 –

JavaScript調試三角形的質心

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