C语言，进制转换之二进制转八进制，完整代码

今天药忘吃喽~ 2022-06-08 12:47 246阅读 0赞

#include "iostream"
    using namespace std;
    #define MAX 50
    int main()//二转八
    {
        cout << "请输入二进制数，并以‘$’结束：";
        char elem2[MAX];
        int flag = 1;
        char ch;
        int i = 0;
        while (flag)
        {
            cin >> ch;
            if (ch != '$')
            {
                elem2[i] = ch;
                i++;
            }
            else
            {
                flag = 0;
            }
        }
        int length = i;
        int n = 0;
        int sum = 0;
        int product = 0;
        if (length % 3 != 0)//将缺位的二进制码用0补齐
        {
            int n = 3 - length % 3;
            int i = 0;
            for (i = length-1; i>=0; i--)
                elem2[i + n] = elem2[i];
            length += n;
            for (i = 0; i < n; i++)
                elem2[i] = '0';
            cout << "补齐之后的内容是：" << endl;
            for (i = 0; i < length; i++)
                cout << elem2[i] << " ";
            cout << endl;
        }
        for (n = 0; n < length; n++)//判断是否是二进制数
        {
            if ('1' == elem2[n] || '0' == elem2[n])
                sum++;
        }
        if (sum == length)
        {
            int elem8[MAX];
            int r = 0;
            int m = 0;
            int p = 0;
            int q = 0;
            for (m = length - 1; m >= 0; m--)
            {
                q = elem2[m] - '0';
                product += q * pow(2, p);
                p++;
                if (3 == p)
                {
                    elem8[r] = product;
                    r++;
                    p = 0;
                    product = 0;
                }
            }
            int j = 0;
            cout << "对应的八进制数是：" << endl;
            for (j = r-1; j>=0;j--)
            cout<<"0"<<elem8[j]<<" ";
            cout << endl;
    
        }
        else
        {
            cout << "你输入的不是二进制数！" << endl;
        }
        return 0;
    }