3.5.cpp

c程序设计技巧, c入门和简单算法设计。

#include<stdio.h>
void number_loop(long n)
{
     int number[20];
     int k=0;
     printf("Print by loop\n");
     while(n>0)
     {
               number[k++]=n%10;
               n/=10;
      }
      for(int i=k-1;i>=0;i--)
      printf("%d ",number[i]);
      printf("\nPrintf by rec");
      printf("\n");
}
void number_rec(long n)
{
     if(n>0)
     {
            number_rec(n/10);
            printf("%d ",n%10);
     }
}
int main()
{
    long n;
    scanf("%d",&n);
    number_loop(n);
    number_rec(n);
    scanf("%d",&n);
    return 0;
}