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.
What is a 'Price Ceiling' A price ceiling is the maximum price a seller is allowed to charge for a product or service. Price ceilings are usually set by law and limit the seller pricing system to ensure fair and reasonable business practices. Price ceilings are often set for essential expenses; for example, some areas have rent ceilings to protect renters from climbing rent prices.