go declared and not used

Go語言在代碼規范中定義未使用的變量會報“declared and not used”錯誤

package main

import "fmt"

func main() {
	var a, b, c int64
	a = 10
	b = 15
	c = a + b
	fmt.Printf("a = %d,b = %d",a ,b)
	//fmt.Printf("c = %d",c)
}

這時候會報錯變量c定義未使用

.\test.go:9:6: c declared and not used