C++ 二进制生成格雷码

Question

想请教一下这段代码哪里不太对？谢谢~

#include <iostream>
using namespace std;
int change10to2(int n)
{
    if (n == 1)
    {
        cout << n;
        return 0;
    }
    change10to2(n / 2);
    cout << n % 2;
}
int geleima(int m)
{
    if (m < 10)
    {
        if (m == 0)
        {
            cout << "0";
        }
        else
        {
            cout << "1";
        }
        return 0;
    }
    else
    {
        if (m % 10 == (m/10) % 10)
            cout << "0";
        else
            cout << "1";
    }
    geleima(m / 10);
}
int main()
{
    int n, m;
    cout << "please input a number:";
    cin >> n;
    m = change10to2(n);
    geleima(m);
    system("pause");
}

Answer 1

在你的int函数最后写上return0这类的