【程序39】題目：編寫(xiě)一個(gè)函數(shù)，輸入n為偶數(shù)時(shí)，調(diào)用函數(shù)求1/2+1/4+...+1/n,當(dāng)輸入n為奇數(shù)時(shí)，調(diào)用函數(shù)1/1+1/3+...+1/n(利用指針函數(shù))?
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yanrun
TA貢獻(xiàn)317條經(jīng)驗(yàn) 獲得超240個(gè)贊
private?static?double?calculate(int?num)?{
????if(num?<=?0)?{
????????return?-1;
????}
????int?j?=?num?%?2?==?0???2?:?1;
????double?sum?=?0;
????for(int?i?=?j;?i?<=?num;?i?+=?2)?{
????????sum?+=?1.0?/?i;
????}
????return?sum;
}添加回答
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