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                            bcadd — 加法，2個任意精度數字的加法計算

bcsub — 減法

bcmul — 乘法

bcdiv — 除法

bcpow — 乘方

bcmod — 取模

bcsqrt — 求二次方根

bccomp — 比較兩個任意精度的數字，返回一個整數的結果：若兩數相等返回0，左數大返回1，否則返回-1

bcpowmod — 求高精度數字乘方求模，數論里非常常用

bcscale — 設置所有bc數學函數的默認小數點保留位數 — 比較兩個高精度數字，返回-1, 0, 1
                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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