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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{
** * **         * * * ** * **
** * *** * * * * ** ** * * * * * *   * * ***
******* * * ** * * ** * * ** * *** *** * * n_2=n_1;
* * *** ** * ** ** ** * **** * *** ***** ** n_1=fib;
* * * ** * * * * * * ** ** * ** * }
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* *** * * ** * * ** ** * * * * *** n_1=1;
* * * ** * ** * ** *** * } *** ** *** ** ****
** ** * ** ** * *** * * * ** * * * * ****
* * *** * }
* ** **** return 0;

}




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