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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 **

{
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* ***** * ** 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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