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package main
import "fmt"
func main() {
var a int = 20 /* actual variable declaration */
fmt.Printf("Value of a variable: %d\n", a )
fmt.Printf("Value of a variable: %d\n", changeValue(a) )
fmt.Printf("Value of a variable: %d\n", a )
fmt.Printf("Value of a variable: %d\n", changePtrValue(&a) )
fmt.Printf("Value of a variable: %d\n", a )
}
func changeValue(a int) int{
a = a*a
return a
}
func changePtrValue(a *int) int{
*a = *a * *a
fmt.Printf("Value of a variable: %d\n", *a )
return *a
}
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