"Go Language Program Design" 6th Chapter Practice

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6.5 Set Dictionary Map1 key is string type, the value is int type, initialize to [psw1:123 psw2:456 psw3:789], require delete key value pair psw2:456, increase key value pair psw4:135, write program implement above function.

6.6 Creates an float64 type of slice that initializes and calculates the average of the slice element.

6.7 Using the byte slicing function in the bytes package, the number of ER words in the statistical text file is included.