• 编程实现将一个N进制数转换成M进制数


    问题:编程实现将一个N进制数转换成M进制数。(c/c++、Java、Javascript、C#、Python)

    1、Python 手写算法版

    def conversion_num(num, src, dest):
        rtn = ''
        # 1、校验源和目标是否相同
        if src == dest:
            rtn = num
        # 2、转成10进制#
        if src != 10:
            num_str = str(num)
            num_str = num_str[::-1]
            exe_num = 0
            dec_num = 0
            for num_char in num_str:
                # 十六进制处理
                if num_char == 'A':
                    num_char = '10'
                elif num_char == 'B':
                    num_char = '11'
                elif num_char == 'C':
                    num_char = '12'
                elif num_char == 'D':
                    num_char = '13'
                elif num_char == 'E':
                    num_char = '14'
                elif num_char == 'F':
                    num_char = '15'
    
                num_int = int(num_char)
                if exe_num == 0:
                    dec_num += num_int
                else:
                    dec_num += src ** exe_num * num_int
                exe_num += 1
            num = dec_num
        # 3、转成目标进制
        if dest == 10:
            rtn = num
        else:
            num = int(num)
            while True:
                divisor = num // dest
                remainder = num % dest
                # 十六进制处理
                if remainder == 10:
                    remainder = 'A'
                elif remainder == 11:
                    remainder = 'B'
                elif remainder == 12:
                    remainder = 'C'
                elif remainder == 13:
                    remainder = 'D'
                elif remainder == 14:
                    remainder = 'E'
                elif remainder == 15:
                    remainder = 'F'
                rtn = str(remainder) + rtn
                if divisor <= 0:
                    break
                else:
                    num = divisor
        # 4、处理空的字符串
        if rtn == '':
            rtn = '0'
        return rtn
    
    
    new_num = conversion_num('111111', 2, 16)
    print(new_num) 

    2、python内部方法版:

    def conversion_num(num, src, dest):
        rtn = ''
        # 1、校验源和目标是否相同
        if src == dest:
            rtn = num
        # 2、转成10进制#
        if src != 10:
            dec_num = 0
            if src == 2:
                dec_num = int(num, 2)
            elif src == 8:
                dec_num = int(num, 8)
            elif src == 16:
                dec_num = int(num, 16)
            num = dec_num
        # 3、转成目标进制
        if dest == 10:
            rtn = num
        else:
            if dest == 2:
                rtn = bin(num)
            elif dest == 8:
                rtn = oct(num)
            elif dest == 16:
                rtn = hex(num)
        # 4、处理空的字符串
        if rtn == '':
            rtn = '0'
        return rtn
    
    
    new_num = conversion_num('111111', 2, 16)
    print(new_num)

     3、

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  • 原文地址:https://www.cnblogs.com/sshoub/p/9076881.html
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