C/C++ Maximum combined length of command line arguments in c++

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The maximum combined length of command line arguments in C is determined by the operating system rather than the C language itself. Historically, DOS and early Windows had a limit of 256 characters, but modern Windows versions, including XP, Vista, and 7, allow up to 8191 characters. In contrast, some Unix systems can support much larger limits, ranging from 65536 to 262144 characters. To find the specific limit for a given system, one can refer to the constant ARG_MAX in the C library header files.
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In a c language, what is the maximum combined length of command line arguments
including the space between adjacent arguments.?
 
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I don't think command line argument restrictions have anything to do with what code an app is written in, it's an O.S. characteristic and is likely to vary among Windows / MAC OS / UNIX.

I think, years ago, there was a DOS and early-windows restriction of 256 characters but I don't know that that still holds in windows.
 
i cannot understand
 
The limit depends on the operating system and the command shell you are using, not on the C language.

On Windows XP, Vista, and Windows 7 it is 8191 characters.
On some Unix systems it is much bigger, with limits like 65536 or even 262144 characters.

Look for the constant ARG_MAX in your C ibrary header files.
 

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