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.
Price Ceilings. A price ceiling is the opposite of a price floor: It's a government-mandated maximum price for a good or service. As economists Paul Krugman and Robin Wells note in their basic text Microeconomics, price ceilings are far less common than price floors in the modern U.S. economy. Still, there are some.hen government imposes a price floor, it's setting a minimum price for a good or service. Most businesses in the country have to contend with the most familiar price floor: the minimum wage. Government has said that there's a certain minimum price employers must pay for labor.