计算输入数据的和与乘积 （C++代码）

解题思路:

                            %10用来求位数,/10用来递减位数

注意事项:

                            一开始以为不够大,提交了好多次,改了半天才发现有一个输入0的检测,

                            所以必须要有手动检测输入0时的状况

参考代码:

                            #include<iostream>
                            #include<cstdlib>
                            int main()
                            {
                                  using namespace std;
                                  unsigned long long num,a,b,m=0,n=1,s;
                                  cin>>num;
                                  s=num;
                                  if(num==0)
                                  {
                                        cout<<"0 0";                           //手动输出0 0,并且退出程序
                                        exit(0);                    
                                  }
                                  while(num)
                                  {
                                        a=num%10;
                                        n*=a;                                       //计算乘积
                                        m+=a;                                      //计算位数和
                                        num/=10;                                //减去最后一位
                                 }
                                 cout<<m<<" "<<n;
                                 return 0;
                            }