The process of calling functions in java

First create a DoSum class, and then write the main function

Then create the Add class, and then create private parameters

Then create several functions, then receive values ​​and output

Then create the sc object in the main function, and then use The object calls the function

# and then uses the system.out.print() method to output the value in the parameter. In this way, the function call is basically completed

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