String functions in C Questions and Answers

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The arguments which we pass to the main() function while executing the program are called as command line arguments. The parameters are always strings held in the second argument (below in args) of the function which is array of character pointers. First argument represents the count of arguments (below in count) and updated automatically by operating system.



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  • memcpy() function is used to copy a specified number of bytes from one memory to another. Whereas, strcpy() function is used to copy the contents of one string into another string.
  • memcpy() function acts on memory rather than value. Whereas, strcpy() function acts on value rather than memory.


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String is a sequence of characters ending with NULL .it can be treated as a one-dimensional array of characters terminated by a NULL character.