我試圖在每次用戶輸入“是”時添加 25，然后打印結果，但在添加它們時它總是缺少第一個響應。那么，如果我對乳制品輸入“是”，我只能得到 75% 的結果？這是針對較大代碼段的一項正在進行的工作，但基本上目前如果您為乳制品輸入“是”，那么它應該將它們全部加起來并等于 100。嘗試了很多不同的選擇，卻一無所獲import java.util.Arrays;import java.util.Scanner;public class question4 { public static void main(String[] args) { Scanner userTypes = new Scanner(System.in); //new object for user input String[] respondents = {"Cormac", "Orla", "Paul", "Sarah"}; String[] questions = {"Are you allergic to Dairy?", "Are you allergic to nuts?", "Are you gluten intolerent?"}; String[] decisions = new String [4]; int dairy= 0; int nuts= 0; int gluten=0; for (int i=0; i<= respondents.length -1 ;i++) { System.out.println(respondents[i]); for (int j=0; j<= questions.length -1; j++) { System.out.println(questions[j]); decisions[j]=userTypes.nextLine(); } System.out.println(Arrays.toString(decisions)); } System.out.println("Allergy Results"); for (int k=0; k <= respondents.length - 1; k++ ){ if (decisions[k].equals("Yes")) { dairy= dairy + 25; } } System.out.println("Dairy Allergy Results = " + dairy + "%"); } }
3 回答
慕工程0101907
TA貢獻1887條經驗 獲得超5個贊
這里的問題是，對于每個受訪者，您都將他們的答案記錄在問題編號decisions[j]中；j但稍后您可以通過迭代受訪者編號來計算“是”響應的decisions[k]數量k。
要么decisions[i]表示某位受訪者對問題 的回答i，要么表示i第 3 位受訪者對問題 1 的回答。它不能同時表示兩者。您需要重新考慮如何存儲這些數據。
此外，由于decisions[j]是為每個受訪者編寫的j，因此每次都會覆蓋該數組，這意味著您最終只會存儲最后一個受訪者的結果。
二維數組可能是一個很好的解決方案，其中decisions[i][j]表示i第 3 個受訪者對問題 的回答j。
阿波羅的戰車
TA貢獻1862條經驗 獲得超6個贊
首先，讓我們格式化代碼。為了存儲 4 個不同用戶對 3 個不同問題的決定，您需要您的數組（數據結構）是這樣的。另外，看起來您（目前）只對有關乳制品問題的決定感興趣。因此，只需在計算中檢查一下即可。我已經更新了代碼并添加了注釋。需要更新存儲結果的部分以及計算乳制品總數的方式。
import java.util.Arrays;
import java.util.Scanner;
public class Question {
public static void main(String[] args) {
Scanner userTypes = new Scanner(System.in); //new object for user input
String[] respondents = {"Cormac", "Orla", "Paul", "Sarah"};
String[] questions = {"Are you allergic to Dairy?", "Are you allergic to nuts?", "Are you gluten intolerent?"};
String[][] decisions = new String [4][3];//You have 4 respondents and You have 3 questions
int dairy= 0;
int nuts= 0;
int gluten=0;
for (int i=0; i<= respondents.length -1 ;i++) {
System.out.println(respondents[i]);
for (int j=0; j<= questions.length -1; j++) {
System.out.println(questions[j]);
decisions[i][j]=userTypes.nextLine();
}
System.out.println("Decisions :: "+Arrays.toString(decisions[i]));//Need to print the result per user
}
System.out.println("Allergy Results");//If you are only interested in dairy decision for the 4 user
for (int k=0; k <= respondents.length - 1; k++ ){
if (decisions[k][0].equals("Yes")) {//for all user check the first decision (as your first question is about dairy)
dairy= dairy + 25;
}
}
System.out.println("Dairy Allergy Results = " + dairy + "%");
userTypes.close();
}
}
Helenr
TA貢獻1780條經驗 獲得超4個贊
好吧，最后我真正基本的解決方案如下，并不理想，但嘿我是初學者:)
public class question4 {
static void allergyTest() { //method for the allergy test
Scanner userTypes = new Scanner(System.in); //new object for user input
String[] respondents = {"Cormac", "Orla", "Paul", "Sarah"};//string array that contains the name of the people being surveyed
String[] questions = {"Are you allergic to Dairy?", "Are you allergic to nuts?", "Are you gluten intolerent?"};// string array to store the questions
String[] decisions = new String [3];//string array to store the responses to the questions
int dairy= 0; //int to store dairy percentage
int nuts= 0;// int to store nuts percentage
int gluten=0; //int to store gluten percentage
for (int i=0; i<= respondents.length -1 ;i++) { // for loop to go through each respondent
System.out.println(respondents[i]); //print their name
for (int j=0; j<= questions.length -1; j++) { //then a for loop to loop through the questions for each respondent
System.out.println(questions[j]); //print the actual question
decisions[j]=userTypes.nextLine(); //take the users input
while(!decisions[j].equals("yes")&& !decisions[j].equals("no")) { //check if the users input is valid, as in yes or no
System.out.println("please type yes or no as your answer"); //if not tell them to type it correctly
decisions[j]=userTypes.nextLine(); //store the yes or no once correctly typed
}
}
if (decisions[0].equals("yes")) { //add up the yes
dairy = dairy +25; //lazy way of getting a percentage because I know the amount of respondents & answers
}
if (decisions[1].equals("yes")) {
nuts = nuts +25;
}
if (decisions[2].equals("yes")) {
gluten = gluten +25;
}
}
System.out.println("Allergy Results");// print the results below
System.out.println("Percentage of people allergic to dairy= "+ dairy +"%");
System.out.println("Percentage of people allergic to nuts= "+ nuts +"%");
System.out.println("People who think they are allergic to gluten= "+ gluten +"%");
}
public static void main(String[] args) { //call the allergy test
allergyTest();
}
}
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