在Visual Basic中,与程序段:a = a + bb = a - ba = a - b功能相同的程序段是A.　a = b　　b = aB.　a = a + b　　a = a - b　　b = a - bC.t = aa = bb = tD.　If a > b Thena = b　　Elseb = a　　End If

在Visual Basic中,与程序段:a = a + bb = a - ba = a - b功能相同的程序段是A.　a = b　　b = aB.　a = a + b　　a = a - b　　b = a - bC.t = aa = bb = tD.　If a > b Thena = b　　Elseb = a　　End If
在Visual Basic中,与程序段:
a = a + b
b = a - b
a = a - b
功能相同的程序段是
A.　a = b
　　b = a
B.　a = a + b
　　a = a - b
　　b = a - b
C.t = a
a = b
b = t
D.　If a > b Then
a = b
　　Else
b = a
　　End If

在Visual Basic中,与程序段:a = a + bb = a - ba = a - b功能相同的程序段是A.　a = b　　b = aB.　a = a + b　　a = a - b　　b = a - bC.t = aa = bb = tD.　If a > b Thena = b　　Elseb = a　　End If
答案为c
'设a的初始值为20,b的初始值为1
a = a + b 'a的值为21
b = a - b 'b的值为20.即 b=a的初始值
a = a - b 'a=21-20=1=b的初始值,即a=b的初始值
简化之后就是
t = a'中转
a=b
b=t