程序：
1 #include<stdio.h> 2 3 int main(){ 4 int num1,num2,temp1,temp2,r; 5 scanf("%d %d",&num1,&num2); 6 temp1 = num1; 7 temp2 = num2; 8 while(temp2 != 0){ 9 r = temp1 % temp2; 10 temp1 = temp2; 11 temp2 = r; 12 } 13 printf("%d %d\n",temp1,num1*num2/temp1); 14 }
求最大公約數：輾轉相除法
求最小公倍數：兩數相乘除以最大公約數