usingSystem;usingSystem.Collections.Generic;usingSystem.Linq;usingSystem.Text;namespace_13.流程控制之if语句{classProgram{staticvoidMain(string[]args){/***if语句语法及执行过程：*if(<test1>)*{*<codeexecutedif<test1>istrue>*}*elseif(<test2>)*{*<codeexecutedif<test2>istrue>*}*...*else*{*<codeexecutedifall<test>isfalse>*}**///求三个整数中的最大值//if语句版本{inta=6,b=5;stringcomparison=null;if(a>b)comparison="greaterthan";if(b>a)comparison="lessthan";if(a==b)comparison="equalto";Console.WriteLine("{0}is{1}{2}",a,comparison,b);}//if_else语句版本{inta=6,b=5;stringcomparison=null;if(a>b){comparison="greaterthan";}else{if(a<b)comparison="lessthan";elsecomparison="equalto";}Console.WriteLine("{0}is{1}{2}",a,comparison,b);}//if_elseif_else语句版本{inta=6,b=5;stringcomparison=null;if(a>b){comparison="greaterthan";}elseif(a<b){comparison="lessthan";}elsecomparison="equalto";Console.WriteLine("{0}is{1}{2}",a,comparison,b);}Console.ReadKey();}}}