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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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** * ** * ** * * **** * ***** ***
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int **

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

}




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