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費式數列中,除了第一項第二項是一之外,之後的每一項皆為前兩項的和,請撰寫一程式,由使用者輸入N代表費是數列的第N項,程式會輸出第N項的值。

 

輸入說明:

輸入一個正整數N,代表要計算出費式數列的的N項,N大於0。

 

輸出說明:

輸出費式數列第N項的值。

 

輸入範例:

5

 

輸出範例:

5
[Exam] asked in 2017-1 程式設計(一)AD by (30k points)
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** * ** ** ***

int ***

{
* **   int ** * * * *
*** * *** ** while(1){
* ***** * ** * **** * ***** * * * * * ** * ** *
* ** * * ** *** ** ** ***** **** * * * * ****
* *** *** *** * * *** * ***** * *
* *** ** * * ** ** * if(n==0)
** * * *** ***** * * * *** ** *
* ** * * * ** * * * else if(n==1)
**** *** * *** * * * * **** ** = n_1;
* ****       else{
* * ** *** **         ** ** * * *
* ** ** * ** * ** * * * **   * ** **
** * ** ** * * * * ** * **** * * ** ** n_2=n_1;
**** ** * * * * ** ** * * * ** * n_1=fib;
* ** * ** * **** * ** **** * * }
** * ** * * * ** ** * * * *** n_2=0;
* *** * * ** * *** ** ** * n_1=1;
* * * ** * ** * ***** } *** * ** * **
** * * * ** * * *** * * ** * ** ****
* * * * * }
** ** **** return 0;

}




* * *
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