update book code

eBook/exercises/chapter_10/employee_salary.go

@@ -0,0 +1,25 @@
+// methods1.go
+package main  
+  
+import "fmt"  
+  
+/* basic data structure upon with we'll define methods */  
+type employee struct {  
+     salary float32  
+}  
+  
+/* a method which will add a specified percent to an 
+   employees salary */  
+func (this *employee) giveRaise(pct float32) {  
+     this.salary += this.salary * pct  
+}  
+  
+func main() {  
+     /* create an employee instance */  
+     var e = new(employee)  
+     e.salary = 100000;  
+     /* call our method */  
+     e.giveRaise(0.04)  
+     fmt.Printf("Employee now makes %f", e.salary)  
+}  
+// Employee now makes 104000.000000