cout & lt;& lt; endl & lt;& lt; ― Its perimeter is:\ t ‖ & lt;& lt; peri; 29. 30. /*-------read the length and the width of a rectangle and compute and print its area and perimeter------------------------------------- */ 31. cout & lt;& lt; endl & lt;& lt; ― enter the length and the width of the rectangle:\ t ‖; 32. cin & gt;& gt; len & gt;& gt; width; 33. 34. computeAreaPeri1(); 35. cout & lt;& lt; endl & lt;& lt; ― the area of the rectangle is:\ t ‖ & lt;& lt; area; 36. cout & lt;& lt; endl & lt;& lt; ― Its perimeter is:\ t ‖ & lt;& lt; peri; 37. return( 0); } © 2011 Gilbert Ndjatou Page 170 Global Variables and Local Variables A global variable is a variable that is defined outside of the body of any function. Examples of global variables are variables len, width, area, and peri defined in figure F1, line 6 to line 9. A global variable can be accessed in the body of any function that appears after its definition. Example In the source module in figure F1, len is accessed in the body of function computeAreaPeri1 in lines 15 and