使用 2 个变量打印斐波那契数列
原文:https://www . geesforgeks . org/print-Fibonacci-sequence-using-2-variables/
打印斐波那契数列。第一个斐波那契数列是:
C++
// Simple CPP Program to print Fibonacci
// sequence
#include <iostream>
using std::cout;
void fib(int n)
{
int a = 0, b = 1, c;
if (n >= 0)
cout << a << " ";
if (n >= 1)
cout << b << " ";
for (int i = 2; i <= n; i++) {
c = a + b;
cout << c << " ";
a = b;
b = c;
}
}
// Driver code
int main()
{
fib(9);
return 0;
}
Java 语言(一种计算机语言，尤用于创建网站)
// Simple Java Program to print
// Fibonacci sequence
import java.io.*;
class GFG {
static void fib(int n)
{
int a = 0, b = 1, c;
if (n >= 0)
System.out.print( a + " ");
if (n >= 1)
System.out.print( b + " ");
for (int i = 2; i <= n; i++)
{
c = a + b;
System.out.print( c + " ");
a = b;
b = c;
}
}
// Driver code
public static void main (String[] args)
{
fib(9);
}
}
// This code is contributed by anuj_67.
Python 3
# Simple Python3 Program to
# print Fibonacci sequence
def fib(n):
a = 0
b = 1
if (n >= 0):
print(a, end=' ')
if (n >= 1):
print(b, end=' ')
for i in range(2, n+1):
c = a + b
print(c, end=' ')
a = b
b = c
# Driver code
fib(9)
# This code is contributed
# by Prasad Kshirsagar
C
// Simple C# Program to print
// Fibonacci sequence
using System;
class GFG
{
static void fib(int n)
{
int a = 0, b = 1, c;
if (n >= 0)
Console.Write( a + " ");
if (n >= 1)
Console.Write( b + " ");
for (int i = 2; i <= n; i++)
{
c = a + b;
Console.Write( c + " ");
a = b;
b = c;
}
}
// Driver code
public static void Main ()
{
fib(9);
}
}
// This code is contributed by anuj_67.
服务器端编程语言（Professional Hypertext Preprocessor 的缩写）
<?php
// Simple php Program to print
// Fibonacci sequence
function fib( $n)
{
$a = 0; $b = 1; $c;
if ($n >= 0)
echo $a , " ";
if ($n >= 1)
echo $b , " ";
for ( $i = 2; $i <= $n; $i++)
{
$c = $a + $b;
echo $c , " ";
$a = $b;
$b = $c;
}
}
// Driver code
fib(9);
// This code is contributed by anuj_67.
?>
java 描述语言
<script>
// Simple Javascript Program to print Fibonacci sequence
function fib(n)
{
let a = 0, b = 1, c;
if (n >= 0)
document.write( a + " ");
if (n >= 1)
document.write( b + " ");
for (let i = 2; i <= n; i++)
{
c = a + b;
document.write( c + " ");
a = b;
b = c;
}
}
fib(9);
// This code is contributed by divyeshrabadiya07.
</script>
Output:
0 1 1 2 3 5 8 13 21 34
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