All about file IO in C++ by Yordanov I.

By Yordanov I.

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Your ISP has a digital phone book, similar to a physical phonebook, called a domain name server that’s used to convert text URLs into IP addresses. With the IP address located, your ISP knows which server on the Internet to forward your request to, and your personal IP address is included in this request. The website server receives your request and sends a copy of the web page code to your computer for your browser to display. Your web browser renders the code onto the screen. FIGURE 2-5: Steps followed to deliver a website to your browser.

Your web browser renders the code onto the screen. FIGURE 2-5: Steps followed to deliver a website to your browser. When you edited the website code using the Developer Tools, you modified only the copy of the website code that exists on your computer, so only you could see the change. When you reloaded the page, you started Steps 1 through 6 again, and retrieved a fresh copy of the code from the server, overwriting any changes you made on your computer. You may have heard of a software tool called an ad blocker.

In fact, in a few minutes you will be writing some computer code yourself! Most computer code performs a range of tasks in our lives from the mundane to the extraordinary. Code runs our traffic lights and pedestrian signals, the elevators in our buildings, the cell phone towers that transmit our phone signals, and the space ships headed for outer space. We also interact with code on a more personal level, on our phones and computers, and usually to check email or the weather. Following instructions Computer code is a set of statements, like sentences in English, and each statement directs the computer to perform a single step or instruction.

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