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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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***** *       else{
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**** ** * * * ** * * ** * * * * * * *** n_2=n_1;
** * *** ** * * * * *** * * * ** * ** * n_1=fib;
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* * * * * * * * * ** * ** * ** ** *
* * * ** * * }
*** *** *** * return 0;

}




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