how dose "itoa" work ?
What do you mean by "ready" functions?
Why do you need to know how this non-standard function is actually coded? All you really should be concerned with is that you are properly using the function. You do this by reading and understanding the documentation for the function.
If you're using a closed source compiler this is the only information you'll have available, the source is not provided. If you're using an open source compiler then you can find and view the actual source code to see how that particular compiler implemented that function, if it does indeed provide the function.
Why do you need to know how this non-standard function is actually coded? All you really should be concerned with is that you are properly using the function. You do this by reading and understanding the documentation for the function.
If you're using a closed source compiler this is the only information you'll have available, the source is not provided. If you're using an open source compiler then you can find and view the actual source code to see how that particular compiler implemented that function, if it does indeed provide the function.
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