Looping Construct

How do we translate this looping construct to C?

We use a while statement

Essential elements of a loop:

There are four essential elements to every loop:

Condition initialization: the condition determining if the loop iterates must be initialized before the first test.
Condition test: the condition is tested to see if the body of the loop is to be executed.
Loop body: the steps to be executed, which MUST include
Condition update: a statement which modifies the condition such that at some time it will become false.

For example:

        i = 0;                /* loop initialization  */
        while( i < 100 )      /* loop test            */
             i = i + 1;       /* loop body and update */

For the stock program, the loop condition is:

        ...
        while there are more stocks to proccess
             ...

How do we tell if there are more stocks?

We will look at three ways:

Count the stocks
Use a special data value
Use End of File

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