C语言实现10进制转变成2进制，8进制，16进制，字符‘0’-‘9’

水深无声 2023-02-20 02:10 28阅读 0赞

## C语言实现10进制转变成2进制，8进制，16进制，字符‘0’-‘9’ ##

## *思路：* ##

依次取余  
选择用递归来实现先输出高位后输出低位

## *1.转二进制实现：* ##

void fun(int n)
    { 
        if(n/2)    //如果n/2=0，就往回返，=1，说明还没有除尽，继续调用自己
            fun(n/2);
        printf("%d",n%2);
    }
    int main()
    { 
        int n;
        scanf("%d",&n);
        fun(n);
        return 0;
    }

### *转二进制实例：* ###

![在这里插入图片描述][20200621181921750.png]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzIwMTg1NzM3_size_16_color_FFFFFF_t_70]

### *转8,16进制思路：* ###

###### 标题算法和转2进制算法一样，对8，16取余就行，16进制需要每次判断余数是否大于9，’A’-‘F’ ######

### *转8,16进制实现：* ###

转16进制

void fun(int n)
    { 
        if(n/16)
            fun(n/16);
        if(n%16>9)
        n%16>9?printf("%c",n%16+55):printf("%d",n%16);  
         //判断是否大于9，大于加55输出对应的A-F
    }
    int main()
    { 
        int n;
        scanf("%d",&n);
        fun(n);
        return 0;
    }

### *转16进制实例：* ###

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzIwMTg1NzM3_size_16_color_FFFFFF_t_70 1]

# *2.转字符‘0’-‘9’：* #

例：369转“369”

### *思路：* ###

对10取余获得它的每一位，加48得到它的ASCLL码

## *转字符‘0’-‘9’实现：* ##

void fun(int n)
    { 
        if(n/10)
            fun(n/10);
        printf("%c",n%10+48);  //获取个位+48得到ASCLL码输出字符
    }
    int main()
    { 
        int n;
        scanf("%d",&n);
        fun(n);
        return 0;
    }

## *转字符‘0’-‘9’实例：* ##

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzIwMTg1NzM3_size_16_color_FFFFFF_t_70 2][]  
额好像看着没什么效果哈

[20200621181921750.png]: https://img-blog.csdnimg.cn/20200621181921750.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzIwMTg1NzM3_size_16_color_FFFFFF_t_70]: https://img-blog.csdnimg.cn/20200621181921744.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzIwMTg1NzM3,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzIwMTg1NzM3_size_16_color_FFFFFF_t_70 1]: https://img-blog.csdnimg.cn/20200621185151380.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzIwMTg1NzM3,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzIwMTg1NzM3_size_16_color_FFFFFF_t_70 2]: https://img-blog.csdnimg.cn/20200621185328811.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzIwMTg1NzM3,size_16,color_FFFFFF,t_70