The things that a C program can do are limitless, but when you're first learning the language, you need to start small. One of the most common functions you'll want your C program to do is display text on the screen, and there are two ways to do so: puts() and printf().
puts()
. Look for a print icon or button. App manufacturers commonly put a print icon or button somewhere on the screen. These are commonly located on a toolbar positioned across the top or bottom of the app. Also you can find Printer on Device and Printer. Take a screenshot of your entire screen by holding the 'Command', 'Shift', and '3' buttons on your keyboard all at the same time. Double-click your screenshot, which can be found on your desktop. It'll open in Preview. Press 'File' and then you'll see the 'Print' option at the bottom of the menu. The print which appears on my screen (a top spec Sony Monitor) is coloured light grey, and difficult to read, especially against the bright screen background. Will you please tell me how to get the print to be fully black.
Puts probably stands for put string, where a string is a bit of text you put to the screen. Regardless, here's how it works:
The text to display — the string — is enclosed in the function's parentheses. Furthermore, it's enclosed in double quotes, which is how you officially create text inside the C language, and how the compiler tells the difference between text and programming statements. Finally, the statement ends in a semicolon.
Here's how puts() might fit into some simple source code:
The puts() function works inside the main() function. It's run first, displaying the text Greetings, human! on the screen. Then the return(0); statement is run next, which quits the program and returns control to the operating system.
printf()
Another C language function that displays text on the screen is printf(), which is far more powerful than puts() and is used more often. While the puts() function merely displays text on the screen, the printf() function displays formatted text. This gives you more control over the output.
Try the following source code:
Type this code into your editor and save it to disk as HELLO.C. Then compile it and run it.
You probably assumed that by putting two printf() statements on separate lines, two different lines of text would be displayed. Wrong!
The puts() function automatically appends a newline character at the end of any text it displays; the printf() function does not. Instead, you must manually insert the newline character (n) into your text.
To 'fix' the line breaks in the preceding HELLO.C file, change line 5 as follows:
The escape sequence n is added after the period. It's before the final quotation marks because the newline character needs to be part of the string that's displayed.
So save the change, recompile HELLO.C, and run it. Now the output is formatted to your liking:
Where is that Print Screen Key Located?
The Windows Print Screen key is normally located at the top right of your keyboard in close proximity to the 'F12' key or 'F-Lock' key and is typically identified by the letters Prt Scrn or Prt Scn. See the example below. How can i take a screenshot on my pc.
. Look for a print icon or button. App manufacturers commonly put a print icon or button somewhere on the screen. These are commonly located on a toolbar positioned across the top or bottom of the app. Also you can find Printer on Device and Printer. Take a screenshot of your entire screen by holding the 'Command', 'Shift', and '3' buttons on your keyboard all at the same time. Double-click your screenshot, which can be found on your desktop. It'll open in Preview. Press 'File' and then you'll see the 'Print' option at the bottom of the menu. The print which appears on my screen (a top spec Sony Monitor) is coloured light grey, and difficult to read, especially against the bright screen background. Will you please tell me how to get the print to be fully black.
Puts probably stands for put string, where a string is a bit of text you put to the screen. Regardless, here's how it works:
The text to display — the string — is enclosed in the function's parentheses. Furthermore, it's enclosed in double quotes, which is how you officially create text inside the C language, and how the compiler tells the difference between text and programming statements. Finally, the statement ends in a semicolon.
Here's how puts() might fit into some simple source code:
The puts() function works inside the main() function. It's run first, displaying the text Greetings, human! on the screen. Then the return(0); statement is run next, which quits the program and returns control to the operating system.
printf()
Another C language function that displays text on the screen is printf(), which is far more powerful than puts() and is used more often. While the puts() function merely displays text on the screen, the printf() function displays formatted text. This gives you more control over the output.
Try the following source code:
Type this code into your editor and save it to disk as HELLO.C. Then compile it and run it.
You probably assumed that by putting two printf() statements on separate lines, two different lines of text would be displayed. Wrong!
The puts() function automatically appends a newline character at the end of any text it displays; the printf() function does not. Instead, you must manually insert the newline character (n) into your text.
To 'fix' the line breaks in the preceding HELLO.C file, change line 5 as follows:
The escape sequence n is added after the period. It's before the final quotation marks because the newline character needs to be part of the string that's displayed.
So save the change, recompile HELLO.C, and run it. Now the output is formatted to your liking:
Where is that Print Screen Key Located?
The Windows Print Screen key is normally located at the top right of your keyboard in close proximity to the 'F12' key or 'F-Lock' key and is typically identified by the letters Prt Scrn or Prt Scn. See the example below. How can i take a screenshot on my pc.
Make sure F-Lock is off before attempting to use the Print Screen Button.
Windows Print Screen Steps (Capture Everything Screenshot)
1. Locate and maximize the elements you'd like to capture on screen.
2. To capture the entire screen, just press Prt Scrn. Nothing visual will indicate that you have successfully captured a screenshot until step 4 below.
3. Open a new document in MS Word, MS Photo Editor, Adobe PhotoShop, or another image editor.
4. Paste by using CTRL+ V while inside your selected image editor.
Windows Print Screen Steps to (Only Capture Selected Windows Screenshot)
1. Locate and maximize the window you'd like to capture.
2. To copy/capture the current window, hold down ALT + Prt Scrn at the same time. Nothing visual will indicate that you have successfully captured a screenshot until step 4 below.
3. Open a new document in MS Word, MS Photo Editor, Adobe PhotoShop, or another image editor.
4. Paste by using CTRL + V while inside your selected image editor.
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