tYSR20

Chapter 2: Declaring Variables Constantly37Naming conventionsYou may have noticed that the name of eachvariable begins with a special character thatseems to have nothing to do with the name.These special characters are shown in the foldVariableas a variable of type double bylowing table. You can immediately recognizeusing this convention.CharacternlfdcszTypeintlongfloatdoublecharacterstringThese leading characters help the programmerkeep track of the variable type. Thus, you canimmediately identify the following as a mixedmodeassignment of a long variable to an intvariable:nVariable = lVariable;These leading characters have no significanceto C++. You don’t need to adopt any namingscheme at all if you don’t want to. Here’s whatyou get:double myVariable;int someIntValue;double nThisDoesntEvenMatch;I used this first-letter-naming convention in thischapter to simplify the discussion; many programmersuse this naming scheme all the time.Mixed-mode expressions are not a good idea. Avoid forcing C++ to do yourconversions for you.