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data-emotion-css="1t5rsib">.css-1t5rsib{display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;-webkit-flex-wrap:wrap;-ms-flex-wrap:wrap;flex-wrap:wrap;-webkit-align-items:center;-webkit-box-align:center;-ms-flex-align:center;align-items:center;-webkit-box-pack:justify;-webkit-justify-content:space-between;-ms-flex-pack:justify;justify-content:space-between;}.css-1t5rsib a{-webkit-text-decoration:none;text-decoration:none;color:var(--accentdark);font-weight:900;text-transform:uppercase;font-size:13px;padding:1px 10px;border-radius:4px;margin-bottom:15px;opacity:0;}</style><div class="sheet-title css-1t5rsib"><h3>ইনপুট/আউটপুট ফান্ডামেন্টালস</h3><a href="cpp-programming#ইনপুট/আউটপুট ফান্ডামেন্টালস"><svg stroke="currentColor" fill="none" stroke-width="2" viewBox="0 0 24 24" stroke-linecap="round" stroke-linejoin="round" height="1em" width="1em" xmlns="http://www.w3.org/2000/svg"><path d="M10 13a5 5 0 0 0 7.54.54l3-3a5 5 0 0 0-7.07-7.07l-1.72 1.71"></path><path d="M14 11a5 5 0 0 0-7.54-.54l-3 3a5 5 0 0 0 7.07 7.07l1.71-1.71"></path></svg></a></div><ul class="single-item"><li class="item"><p class="def">ইনপুট/আউটপুট স্ট্যান্ডার্ড লাইব্রেরি ব্যবহার করার জন্য হেডার ফাইল</p><pre class="code"><code>#include <iostream></code></pre></li><li class="item"><p class="def">কনসোলে আউটপুট দেখানো</p><pre class="code"><code>cout <<</code></pre></li><li class="item"><p class="def">কনসোলে এরোর দেখানো</p><pre class="code"><code>cerr <<</code></pre></li><li class="item"><p class="def">কনসোলে লগ দেখানো</p><pre class="code"><code>clog <<</code></pre></li><li class="item"><p class="def">কনসোল থেকে ইনপুট নেয়া</p><pre class="code"><code>cin >></code></pre></li></ul></div><div id="ফাইল স্ট্রিমস" class="css-tcsorc"><div class="sheet-title css-1t5rsib"><h3>ফাইল স্ট্রিমস</h3><a href="cpp-programming#ফাইল স্ট্রিমস"><svg stroke="currentColor" fill="none" stroke-width="2" viewBox="0 0 24 24" stroke-linecap="round" stroke-linejoin="round" height="1em" width="1em" xmlns="http://www.w3.org/2000/svg"><path d="M10 13a5 5 0 0 0 7.54.54l3-3a5 5 0 0 0-7.07-7.07l-1.72 1.71"></path><path d="M14 11a5 5 0 0 0-7.54-.54l-3 3a5 5 0 0 0 7.07 7.07l1.71-1.71"></path></svg></a></div><ul class="single-item"><li class="item"><p class="def">ইনপুট/আউটপুট ফাইল স্ট্রিমস এর হেডার কোড</p><pre class="code"><code>#include <fstream></code></pre></li><li class="item"><p class="def">ফাইলে লিখার জন্য</p><pre class="code"><code>ofstream myFile</code></pre></li><li class="item"><p class="def">ফাইল থেকে পড়ার জন্য</p><pre class="code"><code>ifstream myFile</code></pre></li><li class="item"><p class="def">ফাইল ওপেন করা</p><pre class="code"><code>myFile.open (filename.txt(file format))</code></pre></li><li class="item"><p class="def">স্ট্রিম অবজেক্ট ব্যবহার করে ফাইল ওপেন করা </p><pre class="code"><code>open (filename, mode)</code></pre></li><li class="item"><p class="def">ইনপুট অপারেশন হিসেবে ফাইল ওপেন করা</p><pre class="code"><code>ios::in</code></pre></li><li class="item"><p class="def">আউটপুট অপারেশন হিসেবে ফাইল ওপেন করা</p><pre class="code"><code>ios::out</code></pre></li><li class="item"><p class="def">বাইনারি মুডে ফাইল ওপেন করা</p><pre class="code"><code>ios::binary</code></pre></li><li class="item"><p class="def">ইনিশিয়াল পসিশন ফাইলের শেষভাগে সেট করা</p><pre class="code"><code>ios::ate</code></pre></li><li class="item"><p class="def">ফাইলের শেষভাগে সকল অপারেশন পারফর্ম করার জন্য</p><pre class="code"><code>ios::app</code></pre></li><li class="item"><p class="def">ফাইলের আগের কনটেন্ট ডিলিট করে নতুন কনটেন্ট দিয়ে রিপ্লেস করার জন্য</p><pre class="code"><code>ios::trunc</code></pre></li><li class="item"><p class="def">ফাইল ক্লোস করার জন্য</p><pre class="code"><code>myFile.close()</code></pre></li><li class="item"><p class="def">ফাইল ওপেন আছে কিনা তা চেক করার জন্য</p><pre class="code"><code>myFile.is_open()</code></pre></li></ul></div><div id="ইটেরেটরস" class="css-tcsorc"><div class="sheet-title css-1t5rsib"><h3>ইটেরেটরস</h3><a href="cpp-programming#ইটেরেটরস"><svg stroke="currentColor" fill="none" stroke-width="2" viewBox="0 0 24 24" stroke-linecap="round" stroke-linejoin="round" height="1em" width="1em" xmlns="http://www.w3.org/2000/svg"><path d="M10 13a5 5 0 0 0 7.54.54l3-3a5 5 0 0 0-7.07-7.07l-1.72 1.71"></path><path d="M14 11a5 5 0 0 0-7.54-.54l-3 3a5 5 0 0 0 7.07 7.07l1.71-1.71"></path></svg></a></div><ul class="single-item"><li class="item"><p class="def">ইটেরটর ইনপুট/আউটপুট স্ট্রিম ডিক্লেয়ার করা</p><pre class="code"><code>#include <iterator></code></pre></li><li class="item"><p class="def">ইনপুট স্ট্রিম থেকে ভ্যালু নিয়ে ইনপুট ইটেরেটর ডিফাইন করা</p><pre class="code"><code>istream_iterator<T> in(is);</code></pre></li><li class="item"><p class="def">আউটপুট ইটেরেটর ডিফাইন করা</p><pre class="code"><code>ostream_iterator<T> out(os);</code></pre></li></ul></div></div><div style="width:50%" class="my-masonry-grid_column"><div id="প্রিপ্রসেসর" class="css-tcsorc"><div class="sheet-title css-1t5rsib"><h3>প্রিপ্রসেসর</h3><a href="cpp-programming#প্রিপ্রসেসর"><svg stroke="currentColor" fill="none" stroke-width="2" viewBox="0 0 24 24" stroke-linecap="round" stroke-linejoin="round" height="1em" width="1em" xmlns="http://www.w3.org/2000/svg"><path d="M10 13a5 5 0 0 0 7.54.54l3-3a5 5 0 0 0-7.07-7.07l-1.72 1.71"></path><path d="M14 11a5 5 0 0 0-7.54-.54l-3 3a5 5 0 0 0 7.07 7.07l1.71-1.71"></path></svg></a></div><ul class="single-item"><li class="item"><p class="def">বর্তমান ডিরেক্টরিতে ফাইল যুক্ত করা</p><pre class="code"><code>#include "myfile.h"</code></pre></li><li class="item"><p class="def">X কে some_text দিয়ে রিপ্লেস করা</p><pre class="code"><code>#define X some_text</code></pre></li><li class="item"><p class="def">F(a,b) কে a+b দ্বারা রিপ্লেস করা</p><pre class="code"><code>#define F(a,b) a+b</code></pre></li><li class="item"><p class="def">ডিফিনেশন রিমুভ করা</p><pre class="code"><code>#undef X</code></pre></li><li class="item"><p class="def">কন্ডিশনাল কম্পাইলেশন (#if defined(X))</p><pre class="code"><code>#ifdef X</code></pre></li><li class="item"><p class="def">কন্ডিশনাল কম্পাইলেশন (#if !defined(X))</p><pre class="code"><code>#ifndef X</code></pre></li><li class="item"><p class="def">কন্ডিশনাল কম্পাইলেশন</p><pre class="code"><code>#else</code></pre></li><li class="item"><p class="def">#if এবং #ifdef এর পর কন্ডিশন সমাপ্তি করার জন্য</p><pre class="code"><code>#endif</code></pre></li></ul></div><div id="এক্সপ্রেশন" class="css-tcsorc"><div class="sheet-title css-1t5rsib"><h3>এক্সপ্রেশন</h3><a href="cpp-programming#এক্সপ্রেশন"><svg stroke="currentColor" fill="none" stroke-width="2" viewBox="0 0 24 24" stroke-linecap="round" stroke-linejoin="round" height="1em" width="1em" xmlns="http://www.w3.org/2000/svg"><path d="M10 13a5 5 0 0 0 7.54.54l3-3a5 5 0 0 0-7.07-7.07l-1.72 1.71"></path><path d="M14 11a5 5 0 0 0-7.54-.54l-3 3a5 5 0 0 0 7.07 7.07l1.71-1.71"></path></svg></a></div><ul class="single-item"><li class="item"><p class="def">T ক্লাশে X নেইম ডিফাইন করা</p><pre class="code"><code>T::X</code></pre></li><li class="item"><p class="def">N নেইমস্পেসে X নেইম ডিফাইন করা</p><pre class="code"><code>N::X</code></pre></li><li class="item"><p class="def">গ্লোবাল নেইম X</p><pre class="code"><code>::X</code></pre></li><li class="item"><p class="def">t ক্লাস অথবা স্ট্র্যাক্ট এর x মেম্বার</p><pre class="code"><code>t.x</code></pre></li><li class="item"><p class="def">ক্লাস অথবা স্ট্র্যাক্ট এর x মেম্বারকে p দ্বারা পয়েন্ট করা</p><pre class="code"><code>p->x</code></pre></li><li class="item"><p class="def">a অ্যারের i ইলিমেন্ট</p><pre class="code"><code>a[i]</code></pre></li><li class="item"><p class="def">x,y আর্গুমেন্ট সহ f ফাংশনকে কল করা</p><pre class="code"><code>f(x,y)</code></pre></li><li class="item"><p class="def">x এবং y সহ T ক্লাশের অবজেক্টকে ইনশিয়ালাইজ করা</p><pre class="code"><code>T(x,y)</code></pre></li><li class="item"><p class="def">x টাইপ</p><pre class="code"><code>typeid(x)</code></pre></li><li class="item"><p class="def">x কে T তে কনভার্ট করে এবং রানটাইমে চেক করে</p><pre class="code"><code>dynamic_cast<T>(x)</code></pre></li><li class="item"><p class="def">x কে T তে কনভার্ট করে কিন্তু কোনো চেক করা ছাড়াই</p><pre class="code"><code>static_cast<T>(x)</code></pre></li><li class="item"><p class="def">T হিসেবে x এর বিটগুলোকে ইন্ট্যারপ্রেট করা</p><pre class="code"><code>reinterpret_cast<T>(x)</code></pre></li><li class="item"><p class="def">x কে T এর সেইম টাইপে কনভার্ট করা</p><pre class="code"><code>const_cast<T>(x)</code></pre></li><li class="item"><p class="def">অবজেক্ট x কে রিপ্রেসেন্ট করতে ব্যবহৃত বাইটের সংখ্যা দেখা</p><pre class="code"><code>sizeof x</code></pre></li><li class="item"><p class="def">টাইপ T কে রিপ্রেসেন্ট করতে ব্যবহৃত বাইটের সংখ্যা দেখা</p><pre class="code"><code>sizeof(T)</code></pre></li><li class="item"><p class="def">p এড্রেসের কন্টেন্ট</p><pre class="code"><code>*p</code></pre></li><li class="item"><p class="def">নতুন এলোকেট করা T অবজেক্টের এড্রেস</p><pre class="code"><code>new T</code></pre></li><li class="item"><p class="def">x এবং y ইনিশিয়ালাইজ করা T অবজেক্টের এড্রেস</p><pre class="code"><code>new T(x,y)</code></pre></li><li class="item"><p class="def">p এড্রেসে থাকা অবজেক্টকে ধ্বংস করা এবং জায়গা খালি করা</p><pre class="code"><code>delete p</code></pre></li><li class="item"><p class="def">p এড্রেসে থাকা অবজেক্টের অ্যারেকে ধ্বংস করা এবং জায়গা খালি করা</p><pre class="code"><code>delete[] p</code></pre></li></ul></div><div id="গাণিতিক লাইব্রেরি ফাংশন সমূহ" class="css-tcsorc"><div class="sheet-title css-1t5rsib"><h3>গাণিতিক লাইব্রেরি ফাংশন সমূহ</h3><a href="cpp-programming#গাণিতিক লাইব্রেরি ফাংশন সমূহ"><svg stroke="currentColor" fill="none" stroke-width="2" viewBox="0 0 24 24" stroke-linecap="round" stroke-linejoin="round" height="1em" width="1em" xmlns="http://www.w3.org/2000/svg"><path d="M10 13a5 5 0 0 0 7.54.54l3-3a5 5 0 0 0-7.07-7.07l-1.72 1.71"></path><path d="M14 11a5 5 0 0 0-7.54-.54l-3 3a5 5 0 0 0 7.07 7.07l1.71-1.71"></path></svg></a></div><ul class="single-item"><li class="item"><p class="def">দুটি সংখ্যার মধ্যে বড় সংখ্যা টি বের করা</p><pre class="code"><code>max(x, y);</code></pre></li><li class="item"><p class="def">দুটি সংখ্যার মধ্যে ছোট সংখ্যা টি বের করা</p><pre class="code"><code>min(x, y);</code></pre></li><li class="item"><p class="def">বর্গমুল বের করা</p><pre class="code"><code>sqrt(x);</code></pre></li><li class="item"><p class="def"> দশমিক সংখ্যাকে পুর্ণসংখ্যা করা</p><pre class="code"><code>round(x);</code></pre></li><li class="item"><p class="def">লগারিদম বের করা</p><pre class="code"><code>log(x);</code></pre></li><li class="item"><p class="def">পরম মান বের করা</p><pre class="code"><code>abs(x);</code></pre></li><li class="item"><p class="def">দশমিক সংখ্যাকে তার কাছাকাছি বড় পূর্ণসংখ্যা করা</p><pre class="code"><code>ceil(x);</code></pre></li><li class="item"><p class="def">দশমিক সংখ্যাকে থেকে দশমিক অংশটুকু বাদ দিয়ে পূর্ণসংখ্যা করা</p><pre class="code"><code>floor(x);</code></pre></li><li class="item"><p class="def">কোনো সংখ্যার(x) এর ঘাত (y) হলে তার মান বের করা</p><pre class="code"><code>pow(x, y);</code></pre></li></ul></div></div></div></div></div></div></div><style data-emotion-css="skvxkl">.css-skvxkl{background:var(--accentlight);text-align:center;}@media print{.css-skvxkl{visibility:hidden;}}</style><footer class="css-skvxkl"><style data-emotion-css="184s5y">.css-184s5y{background:var(--accentdark);border-radius:30px;border-bottom-left-radius:0;border-bottom-right-radius:0;}</style><div color="var(--accentdark)" class="css-184s5y"><style data-emotion-css="1alitl9">.css-1alitl9{margin:0 auto;padding:0 25px;max-width:1260px;}@media (min-width:480px){.css-1alitl9{padding:0 25px;}}</style><div class="css-1alitl9"><style data-emotion-css="1248tdr">.css-1248tdr{padding:100px 0;}@media (max-width:768px){.css-1248tdr{padding:50px 0;}}</style><div class="css-1248tdr"><style 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