c# code:
using System; public class aidd2008 { public static void Main(String[] argv) { int x = 10; int y = 6; if (x > y) { Console.WriteLine(x); } else { Console.WriteLine(y); } Console.Read(); } }
MSIL code:
// =============== CLASS MEMBERS DECLARATION =================== .class public auto ansi beforefieldinit aidd2008 extends [mscorlib]System.Object { .method public hidebysig static void Main(string[] argv) cil managed { .entrypoint // 代码大小 44 (0x2c) .maxstack 2 .locals init (int32 V_0, int32 V_1, bool V_2)//定义三个变量 IL_0000: nop IL_0001: ldc.i4.s 10//把整型值10载入堆栈 IL_0003: stloc.0//把刚才载入堆栈的10赋值给第一个local变量,int x=10 IL_0004: ldc.i4.6//把整型值6载入堆栈 IL_0005: stloc.1//把刚才载入堆栈的6赋值给第二个local变量,int y=6 IL_0006: ldloc.0 IL_0007: ldloc.1//这两句,把x,y两个local变量载入堆栈 IL_0008: cgt//比较x,y的大小,结果会保存在堆栈最上方(结果以0或1表示true ,false) IL_000a: ldc.i4.0//把0载入堆栈 IL_000b: ceq//比较0和cgt的运算结果是否相等,结果会保存在堆栈最上方(结果以0或1表示true ,false) IL_000d: stloc.2//ceq的运算结果保存入bool变量中 IL_000e: ldloc.2//再把ceq运算结果载入 IL_000f: brtrue.s IL_001c//判断跳转,若跳转显式Y,不跳转显式X IL_0011: nop IL_0012: ldloc.0 IL_0013: call void [mscorlib]System.Console::WriteLine(int32) IL_0018: nop IL_0019: nop IL_001a: br.s IL_0025 IL_001c: nop IL_001d: ldloc.1 IL_001e: call void [mscorlib]System.Console::WriteLine(int32) IL_0023: nop IL_0024: nop IL_0025: call int32 [mscorlib]System.Console::Read() IL_002a: pop IL_002b: ret } // end of method aidd2008::Main