如何在程序中包含排序方法？
How to include a sorting method in program?
以下是该计划的要求。本质上，输出必须如下所示，同时仍遵守以下准则。我的问题是如何更改我的程序以满足要求 #4（正在编写一种方法，该方法获取一维和二维数组中的学生数据并打印学生记录：姓名、2 个测验分数和平均分。输出字段应为 well-aligned。）我的第二个问题是如何满足要求 #6（应在学生记录之前打印 header 行，以及一行“------- ----------“应该每 2 个学生打印一次）。
# Name Q1 Q2
name1 ... ... ...
name2 ... ... ...
name3 ... ... ...
name4 ... ... ...
- 姓名 5 ... ... ...
============================================= =====================================
1. 在 main() 方法中，定义一个一维数组，可以存储 5 个学生姓名。在 main() 中定义一个二维数组，存储 5 个学生（行）的考试记录，每个学生有 3 个数据字段（列）：2 个测验分数和 2 个测验的平均值。
将学生姓名（真实姓名）分配给一维数组，将 2 个测验分数分配给二维数组。
计算每个学生 2 次测验的平均值。
4.编写一个获取学生数据（一维和二维数组）的方法，并按平均字段从高到低对学生记录进行排序。
- 编写一个获取学生数据（一维和二维数组）并打印学生记录的方法：姓名、2 个测验分数和平均分。输出字段应为 well-aligned.
6.学生记录前打印header行，每2名学生打印一行“----------------”。
- 下面的输出是一个例子：
名称 Q1 Q2 平均值
name1 ... ... ...
name2 ... ... ...
name3 ... ... ...
name4 ... ... ...
- 姓名 5 ... ... ...
============================================= ====================================
这是我目前所拥有的。我真的对排序方法有问题，每 2 个学生打印一行“----------------”。
public class 学生成绩 {
public static void main(String[] args) {
//create variables to be used inside the "for" loops as counters
int i;
int row;
int column;
String[] students = {"Peter", "Lydia", "Kate", "Steve", "Alexa"};
// Create a 2-D array of the int type to stores scores
int[][] scores = { {82, 90}, {78,90}, {84, 80}, {85, 73}, {81, 93} };
// Display headings for information to be spaced equally
System.out.printf("%-7s%-7s%-7s%-7s%-7s", "Name",
"Test1", "Test2", "Sum of tests ", "Average grade\n");
System.out.print("----------------------------------------\n");
for (i = 0; i <students.length; i++){
System.out.print(students[i] + " \n");
}
// cycle through the each group (outside part of the array)
for (row=0; row<scores.length; row++){
//create variables to store computations and set initial value to zero
int sum = 0;
double avg = 0;
//System.out.print(students[i]);
// cycle through each set of elements of each group (inside part of array)
for (column=0; column<scores[row].length; column++){
// for each set of elements -- add all elements in each group (int sum must be set to 0 each time)
sum += scores[row][column];
// calculate average by dividing the value in int sum by the number of elements in the group (group size)
avg = sum/scores[column].length;
// display the values of each row
System.out.print(scores[row][column] + " ");
}
// display the sum of each group (row) with an identifying message
System.out.print(sum + " " );
// display the average of each group (row) with an identifying message
System.out.print(avg);
// System.out.print(" -------------------------\n");
// create new line after each computation
System.out.println();
// Create dotted lines to separate each set of values displayed
System.out.print("----------------------------------------\n");
}
///////
}
}
package Examples;
public class MarksQuiz {
public static void main(String[] args) {
// create variables to be used inside the "for" loops as counters
int i;
int row;
int column;
String[] students = { "Peter", "Lydia", "Kate", "Steve", "Alexa" };
// Create a 2-D array of the int type to stores scores
int[][] scores = { { 82, 90 }, { 78, 90 }, { 84, 80 }, { 85, 73 }, { 81, 93 } };
// Display headings for information to be spaced equally
System.out.printf("%-7s%-7s%-7s%-7s%-7s", "Name", "Test1", "Test2", "Sum of tests ", "Average grade\n");
System.out.print("----------------------------------------\n");
//Removed the For loop from Here
/*for (i = 0; i < students.length; i++) {
System.out.print(students[i] + " \n");
}*/
// cycle through the each group (outside part of the array)
for (row = 0; row < scores.length; row++) {
System.out.print(students[row]);//Inserted the Print Statement to Fix your Issue
// create variables to store computations and set initial value to
// zero
int sum = 0;
double avg = 0;
// System.out.print(students[i]);
// cycle through each set of elements of each group (inside part of
// array)
for (column = 0; column < scores[row].length; column++) {
// for each set of elements -- add all elements in each group
// (int sum must be set to 0 each time)
sum += scores[row][column];
// calculate average by dividing the value in int sum by the
// number of elements in the group (group size)
avg = sum / scores[column].length;
// display the values of each row
System.out.print(scores[row][column] + " ");
}
// display the sum of each group (row) with an identifying message
System.out.print(sum + " ");
// display the average of each group (row) with an identifying
// message
System.out.print(avg);
// System.out.print(" -------------------------\n");
// create new line after each computation
System.out.println();
// Create dotted lines to separate each set of values displayed
System.out.print("----------------------------------------\n");
}
}
}
输出：-
名称 Test1 Test2 测试总和 平均成绩
彼得 82 90 172 86.0
莉迪亚78 90 168 84.0
凯特 84 80 164 82.0
史蒂夫 85 73 158 79.0
Alexa81 93 174 87.0
以下是该计划的要求。本质上，输出必须如下所示，同时仍遵守以下准则。我的问题是如何更改我的程序以满足要求 #4（正在编写一种方法，该方法获取一维和二维数组中的学生数据并打印学生记录：姓名、2 个测验分数和平均分。输出字段应为 well-aligned。）我的第二个问题是如何满足要求 #6（应在学生记录之前打印 header 行，以及一行“------- ----------“应该每 2 个学生打印一次）。
# Name Q1 Q2
name1 ... ... ...
name2 ... ... ...
name3 ... ... ...
name4 ... ... ...
- 姓名 5 ... ... ...
============================================= ===================================== 1. 在 main() 方法中，定义一个一维数组，可以存储 5 个学生姓名。在 main() 中定义一个二维数组，存储 5 个学生（行）的考试记录，每个学生有 3 个数据字段（列）：2 个测验分数和 2 个测验的平均值。
将学生姓名（真实姓名）分配给一维数组，将 2 个测验分数分配给二维数组。
计算每个学生 2 次测验的平均值。
4.编写一个获取学生数据（一维和二维数组）的方法，并按平均字段从高到低对学生记录进行排序。
- 编写一个获取学生数据（一维和二维数组）并打印学生记录的方法：姓名、2 个测验分数和平均分。输出字段应为 well-aligned.
6.学生记录前打印header行，每2名学生打印一行“----------------”。
- 下面的输出是一个例子：
名称 Q1 Q2 平均值
name1 ... ... ...
name2 ... ... ...
name3 ... ... ...
name4 ... ... ...
- 姓名 5 ... ... ...
============================================= ====================================
这是我目前所拥有的。我真的对排序方法有问题，每 2 个学生打印一行“----------------”。
public class 学生成绩 {
public static void main(String[] args) {
//create variables to be used inside the "for" loops as counters
int i;
int row;
int column;
String[] students = {"Peter", "Lydia", "Kate", "Steve", "Alexa"};
// Create a 2-D array of the int type to stores scores
int[][] scores = { {82, 90}, {78,90}, {84, 80}, {85, 73}, {81, 93} };
// Display headings for information to be spaced equally
System.out.printf("%-7s%-7s%-7s%-7s%-7s", "Name",
"Test1", "Test2", "Sum of tests ", "Average grade\n");
System.out.print("----------------------------------------\n");
for (i = 0; i <students.length; i++){
System.out.print(students[i] + " \n");
}
// cycle through the each group (outside part of the array)
for (row=0; row<scores.length; row++){
//create variables to store computations and set initial value to zero
int sum = 0;
double avg = 0;
//System.out.print(students[i]);
// cycle through each set of elements of each group (inside part of array)
for (column=0; column<scores[row].length; column++){
// for each set of elements -- add all elements in each group (int sum must be set to 0 each time)
sum += scores[row][column];
// calculate average by dividing the value in int sum by the number of elements in the group (group size)
avg = sum/scores[column].length;
// display the values of each row
System.out.print(scores[row][column] + " ");
}
// display the sum of each group (row) with an identifying message
System.out.print(sum + " " );
// display the average of each group (row) with an identifying message
System.out.print(avg);
// System.out.print(" -------------------------\n");
// create new line after each computation
System.out.println();
// Create dotted lines to separate each set of values displayed
System.out.print("----------------------------------------\n");
}
///////
} }
package Examples;
public class MarksQuiz {
public static void main(String[] args) {
// create variables to be used inside the "for" loops as counters
int i;
int row;
int column;
String[] students = { "Peter", "Lydia", "Kate", "Steve", "Alexa" };
// Create a 2-D array of the int type to stores scores
int[][] scores = { { 82, 90 }, { 78, 90 }, { 84, 80 }, { 85, 73 }, { 81, 93 } };
// Display headings for information to be spaced equally
System.out.printf("%-7s%-7s%-7s%-7s%-7s", "Name", "Test1", "Test2", "Sum of tests ", "Average grade\n");
System.out.print("----------------------------------------\n");
//Removed the For loop from Here
/*for (i = 0; i < students.length; i++) {
System.out.print(students[i] + " \n");
}*/
// cycle through the each group (outside part of the array)
for (row = 0; row < scores.length; row++) {
System.out.print(students[row]);//Inserted the Print Statement to Fix your Issue
// create variables to store computations and set initial value to
// zero
int sum = 0;
double avg = 0;
// System.out.print(students[i]);
// cycle through each set of elements of each group (inside part of
// array)
for (column = 0; column < scores[row].length; column++) {
// for each set of elements -- add all elements in each group
// (int sum must be set to 0 each time)
sum += scores[row][column];
// calculate average by dividing the value in int sum by the
// number of elements in the group (group size)
avg = sum / scores[column].length;
// display the values of each row
System.out.print(scores[row][column] + " ");
}
// display the sum of each group (row) with an identifying message
System.out.print(sum + " ");
// display the average of each group (row) with an identifying
// message
System.out.print(avg);
// System.out.print(" -------------------------\n");
// create new line after each computation
System.out.println();
// Create dotted lines to separate each set of values displayed
System.out.print("----------------------------------------\n");
}
}
}
输出：-