?#include<stdio.h>int main(){?int gy(int x,int y);?int a,b,l;??? printf("請輸入兩個正數(shù)");?scanf("%d",&a);?scanf("%d",&b);??? l=gy(a,b);?printf("%d",l);?return 0;}int gy(int x,int y){?? int i;?? do?? {???? i=x-y;???? if(y>i)???? { x=y;???? y=i;}???? else????? x=i;?? }while(i==0);?? return x;}