Fibonacci series program

#include
main()
{
int i,n,f1,f2,f3;
system("clear");
f1=-1;
f2=1;
printf("Enter the limit : ");
scanf("%d",&n);
printf("The Fibonacci series are....\n");
for(i=1;i<=n;i++)
{
f3=f1+f2;
printf("%d\n",f3);
f1=f2;
f2=f3;
}
}