This C tutorial explains how to use the #define preprocessor directive in the C language. In the C Programming Language, the #define directive allows the definition of macros within your source code. These macro definitions allow constant values to be declared for use throughout your code. Macro definitions are not variables and cannot be changed by your program code like variables.
Price Ceilings. If the price ceiling is above the market price, then there is no direct effect. If the price ceiling is set below the market price, then a shortage is created; the quantity demanded will exceed the quantity supplied. The shortage may be resolved in many ways.
Shortages & Surpluses: Why price floors and price ceilings donât work in markets. A shortage happens when there is more of a demand for a good than there is supplied. One way shortages occur is through a price ceiling. An example of a price ceiling we can use to explain the concept would be rent control.