C语言编程练习之二进制与十进制相互转换

r囧r小猫 2023-07-14 05:28 17阅读 0赞

**二进制转换为十进制：**

#include <stdio.h>
    #include <math.h>
    int main()
    { 
        long long x;
        printf("输入一个二进制数:\n");
        scanf("%lld", &x);
        int b=convert(x);
        printf("二进制数 %lld 转换为十进制为 %d", x, b);
        return 0;
    }
     
    int convert(long long x)
    { 
        int decimalNumber = 0, i = 0, j;
        while (x!=0)
        { 
            j = x%10;
            x /= 10;
            decimalNumber += j*pow(2,i);
            ++i;
        }
        return decimalNumber;
        }

**结果如下：**  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L1JESkU1NjUyMw_size_16_color_FFFFFF_t_70]  
**十进制转换为二进制：**  
思路：根据十进制转换为二进制的数学计算步骤和特点编程，十进制数不断除2取余数，最后组合形成二进制数。

#include <stdio.h>
    #include <math.h>
    int main()
    { 
        int x;
        printf("输入一个十进制数: ");
        scanf("%d", &x);
        printf("十进制数 %d 转换为二进制位 %lld", x, convert(x));
        return 0;
    }
    long long convert(int x)
    { 
        long long binaryNumber = 0;
        int remainder, i = 1;
     
        while (x!=0)
        { 
            remainder = x%2;
            x=x/2;
            binaryNumber += remainder*i;
            i = i*10;
        }
        return binaryNumber;
    }

**结果如下：**  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L1JESkU1NjUyMw_size_16_color_FFFFFF_t_70 1]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L1JESkU1NjUyMw_size_16_color_FFFFFF_t_70]: /images/20230529/7dd3c1d04acc449f93590f750e142a61.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L1JESkU1NjUyMw_size_16_color_FFFFFF_t_70 1]: /images/20230529/f34e7df05c5942ce9774d8e64fcabeee.png