template Exercise

 

 1.

 

 2.

 

 3.

 

 4.

 

 

 

 5.

 

 6.

 

The system provides an interface with 

 

But members of the variable types have to be changed

 

 

 7.

 

 to sum up

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Origin www.cnblogs.com/wulinmiao/p/12207746.html