C Programming :: Variable Number of Arguments
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The macro va_arg is used to extract an argument from the variable argument list and advance the pointer to the next argument.
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In a function that receives variable number of arguments the fixed arguments passed to the function can be at the end of argument list.
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A function that receives variable number of arguments should use va_arg() to extract arguments from the variable argument list.
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For a function receives variable number of arguments it is necessary that the function should receive at least one fixed argument.
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A function that receives variable number of arguments should use va_arg() to extract the last argument from the variable argument list.
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The macro va_start is used to initialise a pointer to the beginning of the list of fixed arguments.
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