C語言輸出斐波那契數列實例

斐波那契數列指的是這樣一個數列 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233，377，610，987，1597，2584，4181，6765，10946，17711，28657，46368........

這個數列從第3項開始，每一項都等于前兩項之和。

實例 - 輸出指定數量的斐波那契數列

#include <stdio.h>
 
int main()
{
    int i, n, t1 = 0, t2 = 1, nextTerm;
 
    printf("輸出幾項: ");
    scanf("%d", &n);
 
    printf("斐波那契數列: ");
 
    for (i = 1; i <= n; ++i)
    {
        printf("%d, ", t1);
        nextTerm = t1 + t2;
        t1 = t2;
        t2 = nextTerm;
    }
    return 0;
}

運行結果：

輸出幾項: 10
斐波那契數列: 0, 1, 1, 2, 3, 5, 8, 13, 21, 34,

實例 - 輸出指定數字前的斐波那契數列

#include <stdio.h>
 
int main()
{
    int t1 = 0, t2 = 1, nextTerm = 0, n;
 
    printf("輸入一個正數: ");
    scanf("%d", &n);
 
    // 顯示前兩項
    printf("斐波那契數列: %d, %d, ", t1, t2);
 
    nextTerm = t1 + t2;
 
    while(nextTerm <= n)
    {
        printf("%d, ",nextTerm);
        t1 = t2;
        t2 = nextTerm;
        nextTerm = t1 + t2;
    }
    
    return 0;
}

運行結果：

輸入一個正數: 100
斐波那契數列: 0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89,