C Program Print HCF of N Numbers

#include<stdio.h> 
 void main() 
 { 
     int i,j,h,n,a[100]; 
     int hcf(int,int); 
     clrscr(); 
     printf("Enter how many numbers :"); 
     scanf("%d",& n); 
     for(i=0;i<n;i++) 
         { 
             printf("Enter a Number :"); 
             scanf("%d",& a[i]); 
         } 
             for(i=0;i<n-1;i++) 
                 { 
                      h=hcf(a[i],a[i+1]); 
                      a[i+1]=h; 
                 } 
                      printf("The HCF is :  %d",h); 
                      getch(); 
   } 
        int hcf(int a,int b) 
          { 
               if(a%b==0) 
                { 
                       return b; 
                } 
               else 
               { 
                       return(hcf(b,a%b)); 
               } 
          }