#include <stdio.h>
int main(void)
{
int i, j;
long dec; /* ให้รับค่าอินพุทแบบ Long Integer - เลขจำนวนเต็มแบบยาว */
int bit[32]; /* จองพื้นที่ในการเก็บข้อมูลเลขฐาน 2 ลงใน Array */
clrscr(); /* เคลียร์หน้าจอ */
printf("Decimal Number : "); /* แจ้งผู้ใช้เพื่อเตรียมป้อนค่าเลขฐาน 10 */ scanf("%ld", &dec); /* ต้องใช้ ld เพราะ Input มันเป็นแบบ Long Integer */
i = 0; /* กำหนดค่าเริ่มต้นของ Array */
/* ทำตามที่ได้ออกแบบโปรแกรมเอาไว้ ... ยังไงยังงั้นเลย 55555+ */
do {
bit[i++] = dec % 2; /* การหารเอาเศษ เพื่อให้เป็นคำตอบ */
/* การหารทั่วไป แต่ตัวแปร dec ของภาษา C มันเป็น Integer หรือ เลขจำนวนเต็ม */
/* ดังนั้นมันจึงตัดเศษ (หรือทศนิยม) ทิ้งไปโดยอัตโนมัติ */
dec = dec / 2;
} while (dec > 0); /* เงื่อนไขที่ทำจนกระทั่ง dec = 0 ก็ออกจากวังวนเงื่อนไข */
/* การแสดงผลของการแปลงเลขฐาน 10 เป็นเลขฐาน 2*/
/* j = i - 1 และให้ j ลดค่าลงทีละ 1 ... ก็คืออ่านข้อมูลถอยหลังกลับเท่านั้นเองครับ */
/* เพราะตัวแปรแบบ Array ในภาษา C มันเก็บข้อมูลจากซ้ายไปขวา */
/* ทำให้ LSB มันไปอยู่ทางซ้าย ส่วน MSB มันไปอยู่ทางขวา */
for(j = i - 1; j >= 0; j--)
return 0;
}
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&lt;!DOCTYPE html&gt;
&lt;html lang=&quot;th&quot;&gt;
&lt;head&gt;
    &lt;meta charset=&quot;UTF-8&quot;&gt;
    &lt;meta name=&quot;viewport&quot; content=&quot;width=device-width, initial-scale=1.0&quot;&gt;
    &lt;title&gt;เครื่องคำนวณการเงิน&lt;/title&gt;
    &lt;script src=&quot;https://c...content-available-to-author-only...s.com&quot;&gt;&lt;/script&gt;
    &lt;link rel=&quot;preconnect&quot; href=&quot;https://f...content-available-to-author-only...s.com&quot;&gt;
    &lt;link rel=&quot;preconnect&quot; href=&quot;https://f...content-available-to-author-only...c.com&quot; crossorigin&gt;
    &lt;link href=&quot;https://f...content-available-to-author-only...s.com/css2?family=Inter:wght@400;500;600;700&amp;display=swap&quot; rel=&quot;stylesheet&quot;&gt;
    &lt;style&gt;
        body {
            font-family: 'Inter', sans-serif;
        }
    &lt;/style&gt;
&lt;/head&gt;
&lt;body class=&quot;bg-gradient-to-r from-blue-100 to-purple-100 flex justify-center items-center min-h-screen p-4&quot;&gt;
    &lt;div class=&quot;bg-white rounded-lg shadow-xl p-8 w-full max-w-md transition-transform hover:scale-105&quot;&gt;
        &lt;h1 class=&quot;text-2xl font-semibold text-blue-600 text-center mb-6&quot;&gt;เครื่องคำนวณการเงิน&lt;/h1&gt;
        &lt;div class=&quot;mb-4&quot;&gt;
            &lt;label for=&quot;initialAmount&quot; class=&quot;block text-gray-700 text-sm font-bold mb-2&quot;&gt;เงินต้น:&lt;/label&gt;
            &lt;input type=&quot;number&quot; id=&quot;initialAmount&quot; placeholder=&quot;ระบุเงินต้น&quot; class=&quot;shadow appearance-none border rounded w-full py-2 px-3 text-gray-700 leading-tight focus:outline-none focus:shadow-outline&quot;&gt;
        &lt;/div&gt;
        &lt;div class=&quot;mb-4&quot;&gt;
            &lt;label for=&quot;interestRate&quot; class=&quot;block text-gray-700 text-sm font-bold mb-2&quot;&gt;อัตราดอกเบี้ย (% ต่อปี):&lt;/label&gt;
            &lt;input type=&quot;number&quot; id=&quot;interestRate&quot; placeholder=&quot;ระบุอัตราดอกเบี้ย&quot; class=&quot;shadow appearance-none border rounded w-full py-2 px-3 text-gray-700 leading-tight focus:outline-none focus:shadow-outline&quot;&gt;
        &lt;/div&gt;
        &lt;div class=&quot;mb-4&quot;&gt;
            &lt;label for=&quot;years&quot; class=&quot;block text-gray-700 text-sm font-bold mb-2&quot;&gt;จำนวนปี:&lt;/label&gt;
            &lt;input type=&quot;number&quot; id=&quot;years&quot; placeholder=&quot;ระบุจำนวนปี&quot; class=&quot;shadow appearance-none border rounded w-full py-2 px-3 text-gray-700 leading-tight focus:outline-none focus:shadow-outline&quot;&gt;
        &lt;/div&gt;
        &lt;div class=&quot;mb-6&quot;&gt;
            &lt;label for=&quot;compoundFrequency&quot; class=&quot;block text-gray-700 text-sm font-bold mb-2&quot;&gt;ความถี่ในการทบต้น:&lt;/label&gt;
            &lt;select id=&quot;compoundFrequency&quot; class=&quot;shadow appearance-none border rounded w-full py-2 px-3 text-gray-700 leading-tight focus:outline-none focus:shadow-outline&quot;&gt;
                &lt;option value=&quot;1&quot;&gt;รายปี&lt;/option&gt;
                &lt;option value=&quot;2&quot;&gt;ทุกครึ่งปี&lt;/option&gt;
                &lt;option value=&quot;4&quot;&gt;ทุกไตรมาส&lt;/option&gt;
                &lt;option value=&quot;12&quot;&gt;รายเดือน&lt;/option&gt;
            &lt;/select&gt;
        &lt;/div&gt;
        &lt;button id=&quot;calculateBtn&quot; class=&quot;bg-gradient-to-r from-green-400 to-blue-500 hover:from-green-500 hover:to-blue-600 text-white font-bold py-2 px-4 rounded focus:outline-none focus:shadow-outline w-full transition duration-300 ease-in-out&quot;&gt;คำนวณ&lt;/button&gt;
        &lt;div id=&quot;result&quot; class=&quot;mt-6 text-center text-lg font-semibold text-green-600&quot;&gt;&lt;/div&gt;
    &lt;/div&gt;

    &lt;script&gt;
        const initialAmountInput = document.getElementById(&quot;initialAmount&quot;);
        const interestRateInput = document.getElementById(&quot;interestRate&quot;);
        const yearsInput = document.getElementById(&quot;years&quot;);
        const compoundFrequencySelect = document.getElementById(&quot;compoundFrequency&quot;);
        const calculateBtn = document.getElementById(&quot;calculateBtn&quot;);
        const resultDiv = document.getElementById(&quot;result&quot;);

        calculateBtn.addEventListener(&quot;click&quot;, function() {
            const initialAmount = parseFloat(initialAmountInput.value);
            const interestRate = parseFloat(interestRateInput.value);
            const years = parseInt(yearsInput.value);
            const compoundFrequency = parseInt(compoundFrequencySelect.value);

            if (isNaN(initialAmount) || isNaN(interestRate) || isNaN(years)) {
                resultDiv.textContent = &quot;กรุณาระบุข้อมูลให้ครบถ้วน&quot;;
                resultDiv.classList.remove(&quot;text-green-600&quot;);
                resultDiv.classList.add(&quot;text-red-600&quot;);
                return;
            }

            if (interestRate &lt; 0) {
                resultDiv.textContent = &quot;กรุณาระบุอัตราดอกเบี้ยเป็นค่าบวก&quot;;
                resultDiv.classList.remove(&quot;text-green-600&quot;);
                resultDiv.classList.add(&quot;text-red-600&quot;);
                return;
            }

            const futureValue = initialAmount * Math.pow(1 + (interestRate / 100) / compoundFrequency, compoundFrequency * years);
            resultDiv.textContent = `มูลค่าในอนาคต: ${futureValue.toFixed(2)} บาท`;
            resultDiv.classList.remove(&quot;text-red-600&quot;);
            resultDiv.classList.add(&quot;text-green-600&quot;);
        });
    &lt;/script&gt;
&lt;/body&gt;
&lt;/html&gt;


<!DOCTYPE html>
<html lang="th">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>เครื่องคำนวณการเงิน</title>
<script src="https://c...content-available-to-author-only...s.com"></script>
<link rel="preconnect" href="https://f...content-available-to-author-only...s.com">
<link rel="preconnect" href="https://f...content-available-to-author-only...c.com" crossorigin>
<link href="https://f...content-available-to-author-only...s.com/css2?family=Inter:wght@400;500;600;700&display=swap" rel="stylesheet">
<style>
body {
font-family: 'Inter', sans-serif;
}
</style>
</head>
<body class="bg-gradient-to-r from-blue-100 to-purple-100 flex justify-center items-center min-h-screen p-4">
<div class="bg-white rounded-lg shadow-xl p-8 w-full max-w-md transition-transform hover:scale-105">
<h1 class="text-2xl font-semibold text-blue-600 text-center mb-6">เครื่องคำนวณการเงิน</h1>
<div class="mb-4">
<label for="initialAmount" class="block text-gray-700 text-sm font-bold mb-2">เงินต้น:</label>
<input type="number" id="initialAmount" placeholder="ระบุเงินต้น" class="shadow appearance-none border rounded w-full py-2 px-3 text-gray-700 leading-tight focus:outline-none focus:shadow-outline">
</div>
<div class="mb-4">
<label for="interestRate" class="block text-gray-700 text-sm font-bold mb-2">อัตราดอกเบี้ย (% ต่อปี):</label>
<input type="number" id="interestRate" placeholder="ระบุอัตราดอกเบี้ย" class="shadow appearance-none border rounded w-full py-2 px-3 text-gray-700 leading-tight focus:outline-none focus:shadow-outline">
</div>
<div class="mb-4">
<label for="years" class="block text-gray-700 text-sm font-bold mb-2">จำนวนปี:</label>
<input type="number" id="years" placeholder="ระบุจำนวนปี" class="shadow appearance-none border rounded w-full py-2 px-3 text-gray-700 leading-tight focus:outline-none focus:shadow-outline">
</div>
<div class="mb-6">
<label for="compoundFrequency" class="block text-gray-700 text-sm font-bold mb-2">ความถี่ในการทบต้น:</label>
<select id="compoundFrequency" class="shadow appearance-none border rounded w-full py-2 px-3 text-gray-700 leading-tight focus:outline-none focus:shadow-outline">
<option value="1">รายปี</option>
<option value="2">ทุกครึ่งปี</option>
<option value="4">ทุกไตรมาส</option>
<option value="12">รายเดือน</option>
</select>
</div>
<button id="calculateBtn" class="bg-gradient-to-r from-green-400 to-blue-500 hover:from-green-500 hover:to-blue-600 text-white font-bold py-2 px-4 rounded focus:outline-none focus:shadow-outline w-full transition duration-300 ease-in-out">คำนวณ</button>
<div id="result" class="mt-6 text-center text-lg font-semibold text-green-600"></div>
</div>
<script>
const initialAmountInput = document.getElementById("initialAmount");
const interestRateInput = document.getElementById("interestRate");
const yearsInput = document.getElementById("years");
const compoundFrequencySelect = document.getElementById("compoundFrequency");
const calculateBtn = document.getElementById("calculateBtn");
const resultDiv = document.getElementById("result");
calculateBtn.addEventListener("click", function() {
const initialAmount = parseFloat(initialAmountInput.value);
const interestRate = parseFloat(interestRateInput.value);
const years = parseInt(yearsInput.value);
const compoundFrequency = parseInt(compoundFrequencySelect.value);
if (isNaN(initialAmount) || isNaN(interestRate) || isNaN(years)) {
resultDiv.textContent = "กรุณาระบุข้อมูลให้ครบถ้วน";
resultDiv.classList.remove("text-green-600");
resultDiv.classList.add("text-red-600");
return;
}
if (interestRate < 0) {
resultDiv.textContent = "กรุณาระบุอัตราดอกเบี้ยเป็นค่าบวก";
resultDiv.classList.remove("text-green-600");
resultDiv.classList.add("text-red-600");
return;
}
const futureValue = initialAmount * Math.pow(1 + (interestRate / 100) / compoundFrequency, compoundFrequency * years);
resultDiv.textContent = `มูลค่าในอนาคต: ${futureValue.toFixed(2)} บาท`;
resultDiv.classList.remove("text-red-600");
resultDiv.classList.add("text-green-600");
});
</script>
</body>
</html>