#include<iostream.h>void main(){int a=2,b=3,c;b^=a;cout<<b<<endl;}上例中定義一個(gè)為復(fù)出值的變量C編譯時(shí)-------------------Configuration: zb1 - Win32 Debug--------------------Compiling...001.cppE:\Visual C++\zb1\001.cpp(4) : warning C4101: 'c' : unreferenced local variableLinking...zb1.exe - 0 error(s), 0 warning(s)