main()
{int m,n,a,b,temp,answer1,answer2;
 printf("please input two integer numbers:\n");
 scanf("%d%d",&m,&n);
 if(m<n)
    {temp=m;m=n;n=temp;}
 a=m;b=n;
 while(b!=0)
  {temp=a%b;
   a=b;
   b=temp;
  }
 answer1=a;
 answer2=m*n/a;
 printf("the greatest common divisor is %d\n",answer1);
 printf("the lease common multiple is %d\n",answer2);
}


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main()
{int m,n,temp,answer1,answer2;
 printf("please input two integer numbers:\n");
 scanf("%d%d",&m,&n);
 for(answer1=m;;answer1--)
   if(m%answer1==0&&n%answer1==0) break;
 for(answer2=m;;answer2++)
   if(answer2%m==0&&answer2%n==0) break;
 printf("the greatest common divisor is %d\n",answer1);
 printf("the lease common multiple is %d\n",answer2);
}



这是两种写法,我想请问,这样写的算术方法是什么,谢谢了