求一组数的最小公倍数
题目：求一个×××数组的所有元素的最小公倍数，在不溢出的情况下
long long LCM(int num1, int num2)
{
long long mul = num1*num2;
while (num1%num2)
{
int temp = num1%num2;
num1 = num2;
num2 = temp;
}
return mul / num2;
}
long long leastCommonMultiple(int arr[], int size)
{
long long ret = 1;
for (int i = 0; i < size; ++i)
{
ret = LCM(ret, arr[i]);
}
return ret;
}
int main()
{
int arr[] = { 3, 9, 18 };
cout << leastCommonMultiple(arr, 3) << endl;
system("pause");
return 0;
}