14 lines
926 B
Markdown
14 lines
926 B
Markdown
The function ``printf`` is the standard way in C to write something to the standard output.
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You can just print out a string, but more often then not you want to augment your string with text or numbers determine at runtime.
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For that printf has placeholders. When you write % into your string, printf expects you to pass in an argument, to replace the %.
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Unfortunately writing % isn't enough you also have to specify the type of the argument. To tell printf what kind of argument to expect,
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you have to write a letter after the %.
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* s for an nullterminated string. If it is not nullterminated your program could crash.
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* c for a single character
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* d for an signed integer
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* u for an unsigned integer
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* f for floating point numbers
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This is not a complete list. You also can specify some formatting options. If you are on a linux system you can use __man printf__ to get all the options or you can simply use google. |