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C function comparison table

Subject	perform	lack	is a kind of	be	have high cohesion
C module	a special-purpose function such as the user interface for a particular system	side effects if it does not modify any data, and does not leave behind any information, other than its result, that would have an effect on other computations	module	reusable if it can be used in several different systems with little or no modification	if related aspects of a system are kept together in this module, and unrelated aspects are kept out
function			programming language construct
C function	a special-purpose function such as the user interface for a particular system	side effects if it does not modify any data, and does not leave behind any information, other than its result, that would have an effect on other computations	function	reusable if it can be used in several different systems with little or no modification	if related aspects of a system are kept together in this module, and unrelated aspects are kept out

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