c program to generate fibonacci series

FIBONACCI SERIES

#include<stdio.h>
#include<conio.h>
void fibo(int);   //prototype declaration
void main()
{
int n;
clrscr();
printf("enter the range of fibonacci series..");
scanf("%d",&n);
printf("%d",0);
fibo(n);
getch();
}
void fibo(int n)
{
int first=0,second=1,sum=0;
while(n>0)
{
sum=first+second;
first=second;
second=sum;
printf("\t%d",sum);
n--;
}
}