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.
Two such conditions are price ceilings and price floors. Let us begin with price ceilings. 1. Price Ceilings One interference with the market process is called a price ceiling. A price ceiling occurs when the price is artificially held below the equilibrium price and is not allowed to rise. There are many examples of price ceilings.