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

}




*** * ** *** *
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