嘿,我正在尝试转置一个二维数组,其行/列由用户输入。我浏览过这个网站,几乎所有我看到的建议都是针对方形数组(2x2、3x3 等...)
这就是我到目前为止所拥有的
import java.util.Scanner;
public class ArrayTranspose {
public static void main(String[] args) {
Scanner kb = new Scanner(System.in);
System.out.print("Input the number of rows (must be between 2 and 5): ");
int rows = kb.nextInt();
if ((rows < 2) && (rows > 5)) {
System.out.println("Error: range must be between 2-5");
rows = -1;
}
System.out.print("Input the number of columns (must be between 2 and 5): ");
int cols = kb.nextInt();
if ((cols < 2) && (cols > 5)) {
System.out.println("Error: range must be between 2-5");
cols = -1;
}
int myArray[][] = new int[rows][cols];
for (int i = 0; i < rows; i++) {
for (int j = 0; j < cols; j++) {
System.out.println("Enter a data value for (" + (i + 1) + ", " + (j + 1) + "): ");
int value = kb.nextInt();
myArray[i][j] = value;
}
}
printArray(myArray);
System.out.println();
int newArray[][] = transpose(myArray);
printNewArray(newArray);
}
public static void printArray(int myArray[][]) {
int dim1 = myArray.length; // Gets the number of rows
int dim2 = myArray[0].length; // Gets the number of columns
for (int i = 0; i < dim1; i++) {
for (int j = 0; j < dim2; j++) {
System.out.printf("%4d", myArray[i][j]);
}
System.out.println();
}
}
public static int[][] transpose(int myArray[][]) {
int newArray[][] = new int[myArray[0].length][myArray.length];
for (int i = 0; i < myArray.length; i++) {
for (int j = 0; j < i; j++) {
// swap element[i,j] and element[j,i]
int temp = myArray[i][j];
newArray[i][j] = temp;
}
}
return newArray;
}
public static void printNewArray(int myArray[][]) {
int dim1 = myArray.length; // Gets the number of rows
int dim2 = myArray[0].length; // Gets the number of columns
for (int i = 0; i < dim1; i++) {
for (int j = 0; j < dim2; j++) {
System.out.printf("%4d", myArray[i][j]);
}
System.out.println();
}
}
}
当我运行该程序时,我得到这样的信息:
输入行数(必须在 2 到 5 之间):2
输入列数(必须在 2 到 5 之间):3
输入 (1, 1) 的数据值:
11
输入 (1, 2) 的数据值:
12
输入 (1, 3) 的数据值:
13
输入 (2, 1) 的数据值:
21
输入 (2, 2) 的数据值:
22
输入 (2, 3) 的数据值:
23
11 12 13
21 22 23
0 0
21 0
0 0
所以看起来一切都很顺利(它知道转置数组的新维度),但是转置数组中的数据值并没有从原始数组中获取所有数字。
public static int[][] transpose(int myArray[][]) {
int newArray[][] = new int[myArray[0].length][myArray.length];
for (int i = 0; i < myArray[0].length; i++) {
for (int j = 0; j < myArray.length; j++) {
int temp = myArray[j][i];
newArray[i][j] = temp;
}
}
return newArray;
}
希望这可以帮助 :)
本文内容由网友自发贡献,版权归原作者所有,本站不承担相应法律责任。如您发现有涉嫌抄袭侵权的内容,请联系:hwhale#tublm.com(使用前将#替换为@)