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                            1、總結
a.若傳遞int這總簡單類型，建議值傳遞，不要用引用。
b.如果傳遞類對象，避免隱式類型轉換；全部都在創建線程這一行，就構建臨時對象，然后在函數參數里用引用來接，否則系統還會構建一次對象，就會有三次構建。
c.不建議使用detach，只是用join，這樣就不存在局部變量失效導致線程對內存的的非法引用的問題；


                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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