C Language - Generate Lucas Series.

Q6. WAP to generate Lucas Series: 2 1 3 4 7 11 18 … n.

#include<stdio.h>
#include<conio.h>
void main()
{
    int n,l,a=2,b=1,c=0,i++;
    printf("Enter number: ");
    scanf("%d",&n);
    printf("2")
    printf(" 1");
    c=a+b;
    for(i=1;c<n;i++)
    {
        printf(" %d",c);
        a=b;
        b=c;
        c=a+b;
    }
    getch();
}

Enter number: 10
2 1 3 4 7