求一个整数的位数及每一位数

解题思路:

注意事项:

参考代码:

#include<iostream>

using namespace std;

int main()

{

int x, sum = 10, a = 1;

cin >> x;

while (true) //求位数

{

if (x / sum == 0)

{

break;

}

sum = sum * 10;

a++;

}

cout << a << endl;

int j = a;

int x1 = x;

for (a; a > 0; a--)  //求每一位数

{

cout << x / (sum / 10) << " ";

x = x % (sum / 10);

sum = sum / 10;

}

cout << endl;

for (int i = 0; i < j; i++) //倒叙输出这个数

{

cout << x1 % 10;

x1 = x1 / 10;

}

cout << endl;

return 0;

}