Functions calling functions: A function body can contain a call to another function. It acts as same as if called from a main function. The declaration for function should appear before usage of function. In programs all function declarations come after main function. A function call can be placed within another function’s definition. The definition of one function could not be placed within body of definition of another function. Precondition and Post conditions: A function declaration comment can be written as two types of information that is precondition and post condition. When a function is called, the precondition states conditions to be true. The function could not be used or perform correctly unless precondition holds. The post condition describes function call effect; it states conditions to be true after execution of function where precondition holds. The post condition describes value returned by function if it returns one. The post condition describes changes made to argument values for a function that may change values of variables.

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Chapter 5.3, Problem 16STE

Program Plan Intro

Functions calling functions:

A function body can contain a call to another function.

It acts as same as if called from a main function.

The declaration for function should appear before usage of function.

In programs all function declarations come after main function.

A function call can be placed within another function’s definition.

The definition of one function could not be placed within body of definition of another function.

Precondition and Post conditions:

A function declaration comment can be written as two types of information that is precondition and post condition.

When a function is called, the precondition states conditions to be true.

The function could not be used or perform correctly unless precondition holds.

The post condition describes function call effect; it states conditions to be true after execution of function where precondition holds.

The post condition describes value returned by function if it returns one.

The post condition describes changes made to argument values for a function that may change values of variables.

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