main(){int x,y,a,m,n,t;printf("please input two num x,y\n");scanf("%d,%d",&x,&y);for(a=x0;a--)if(x%a==0&&y%a==0){printf("x,y的最大公约数是 %d\n",a);break;}m=x/a;n=y/a;t=a*m*n;printf("x,y的最小公倍数是...