我正在嘗試使用substring獲取男性和女性的數(shù)量。但在本例中，我創(chuàng)建了 2 個(gè)類，并使用掃描儀輸入我想要的記錄數(shù)。如何組合for 循環(huán)中的計(jì)數(shù)？我已經(jīng)得到了M和F的計(jì)數(shù)，但它沒(méi)有得到我的預(yù)期輸出。我嘗試刪除 for 循環(huán)，僅刪除 for 循環(huán)，但它需要處于循環(huán)中，否則可能會(huì)出錯(cuò)。如果我再次放置 for 循環(huán)，它會(huì)起作用，但它被分開(kāi)“它在輸出框上”。如果我做錯(cuò)了請(qǐng)告訴我。A[i] = Outputpublic class Input { String info, gender; int resultf; int resultm; static Scanner in = new Scanner (System.in); public void inputted() { System.out.print("Enter a Gender: "); info = in.nextLine(); gender = info.substring(0,1); } public void Output() { resultm = info.length() - info.replaceAll("M", "").length(); resultf = info.length() - info.replaceAll("F", "").length(); System.out.println("Male: "+resultm); System.out.println("Female: "+resultf); }}public class Output { static Input A[] = new Input [100]; static Scanner in = new Scanner (System.in); public static void main (String args []) { int i, size; //Input System.out.print("Enter how many record: "); size = in.nextInt(); for (i = 0; i < size; i++) { A[i] = new Input(); A[i].inputted(); } System.out.println(); //Print for (i = 0; i < size; i++) { System.out.println("Gender: "+A[i].gender); } System.out.println(); //Output Section for (i = 0; i < size; i++) { A[i].Output(); } }}輸出：Enter how many record: 2Enter a Gender: MEnter a Gender: FGender: MGender: FMale: 1Female: 0Male: 0Female: 1預(yù)期輸出：Enter how many record: 2Enter a Gender: MEnter a Gender: FGender: MGender: FMale: 1Female: 1
2 回答
海綿寶寶撒
TA貢獻(xiàn)1809條經(jīng)驗(yàn) 獲得超8個(gè)贊
您必須在主函數(shù)中對(duì)其進(jìn)行計(jì)數(shù)，而不是在輸入類中進(jìn)行計(jì)數(shù)。
public class Input {
//add functions below
public boolean IsMale(){return resultm == 1;}
public boolean IsFemale(){return resultf == 1;}
//another way without boolean
public int GetMaleCount(){return resultm;}
public int GetFemaleCount(){return resultf;}
}
將 main 中的輸出部分更改為以下內(nèi)容：
int male = 0;
int female = 0;
for (i = 0; i < size; i++) {
//if(A[i].IsMale()){male ++;}
//if(A[i].IsFemale()){female ++;}
//another way without boolean
male += A[i].GetMaleCount();
female += A[i].GetFemaleCount();
}
System.out.println("Male: "+male);
System.out.println("Female: "+female);
哈士奇WWW
TA貢獻(xiàn)1799條經(jīng)驗(yàn) 獲得超6個(gè)贊
在最后一個(gè)循環(huán)中，main您Input.Output根據(jù)數(shù)組的大小調(diào)用了基數(shù)，并在該方法上打印了性別。更改Input.Output打印數(shù)據(jù)的方式。嘗試添加檢查if以檢查您的打印是男性還是女性?；蛘咧皇歉淖兇蛴〗Y(jié)果的邏輯。
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