gcd of an array cpp code example

Example 1: gcd in c++

#include<iostream>
using namespace std;
long long gcd(long long a, long long b) 
{ 
    if (b == 0) 
        return a; 
    return gcd(b, a % b);  
      
} 
int main()
{
	long long a,b;
	cin>>a>>b;
	cout<<gcd(a,b);
}

Example 2: c++ program to find gcd of 3 numbers

#include<stdio.h>
int main() {    
  int a,b,c,hcf,st;
  printf("Enter three numbers : ");
  scanf("%d,%d,%d", &a,&b,&c);
  st=a<b?(a<c?a:c):(b<c?b:c);
  for (hcf=st;hcf>=1;hcf--) 	{  	  
    if (a%hcf==0 && b%hcf==0 && c%hcf==0)
      break;
  }
  printf("%d",hcf); return 0;
}