cpp/math/lcm_of_array.cpp at master · romi2002/cpp · GitHub

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// C++ program to find LCM of n elements
// Author Bharat Reddy

#include<bits/stdc++.h>
usingnamespacestd;

typedeflonglongint ll;


intgcd(int a, int b)
{
if (b == 0)
return a;
returngcd(b, a % b);
}

// Returns LCM of array elements
ll findlcm(int arr[], int n)
{

 ll ans = arr[0];

for (int i = 1; i < n; i++)
 ans = (((arr[i] * ans)) /
 (gcd(arr[i], ans)));

return ans;
}

intmain()
{
int n;
 cout<<"Enter size of array : ";
 cin>>n;
int a[n];
 cout<<"Enter elements of array"<<endl;
int i;
for(i=0;i<n;i++)
 cin>>a[i];
printf("%lld\n", findlcm(a, n));
return0;
}