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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)
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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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