一个数列的前三项依次为0，0，1，以后的每项都是其前三项的和，

#include <stdio.h>

void Calc ( int a, int b, int c )
{
int d = a + b + c;
printf ( "%d ", d );
if ( d > 1000 )
return;
Calc ( b, c, d );
}

void main()
{
printf ( "0 0 1 " );
Calc ( 0, 0, 1 );
}

#include <stdio.h>

int main()
{
int i,former,middle,last,temp1,temp2;
former = 0;
middle = 0;
last = 1;
printf("%d %d %d ",former,middle,last);
for(i=4;i<=1000;i++)
{
temp1 = last;
last = former + middle + last;
temp2 = middle;
middle = temp1;
former = temp2;
printf("%d ",last);
}
return 0;
}

ps:这是最普通的一种算法~

#include<iostream>
using namespace std;
int main(){
int a[4]={0,0,1};
int i;
for(i=0;i<3;i++)
cout<<a[i]<<endl;
while(1){
a[3]=a[0]+a[1]+a[2];