目录求和累加和累乘trapz连乘YAUqUp连加元素连乘prod, nanprod；元素求和sum, nansum累加累加cumsum, nancumsum；累乘cumprod, nancumprod；
I use Visual studio 2008 I have 5 listbox\'s on form,I created a new classfile -called him\"scaner.cs\"
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