英文:
(JAVA) Need assistance on creating this multiplication table
问题
以下是翻译好的代码部分：
public static void main(String[] args) {
System.out.println();
int[][] smallTable = createMultiplicationTable(3);
printMultiplicationTable(smallTable);
System.out.println();
int[][] largeTable = createMultiplicationTable(10);
printMultiplicationTable(largeTable);
}
// 创建并返回一个有 n 行 n 列的乘法表
public static int[][] createMultiplicationTable(int n) {
int max = n;
int[][] table = new int[max][max];
for (int i = 1; i < max; i++) {
for (int j = 1; j < max; j++) {
table[i][j] = i * j;
}
}
return table;
}
// 使用 %4d 打印乘法表中的每个值
public static void printMultiplicationTable(int[][] table) {
int max = table.length;
for (int i = 0; i < max; i++) {
for (int j = 0; j < max; j++) {
System.out.printf("%4d", table[i][j]);
}
System.out.println();
}
}
}
如果你的代码输出的格式不正确，你可能需要检查你的循环边界。在 createMultiplicationTable 方法中，你使用的循环应该从索引 0 开始，因为数组的索引是从 0 开始计数的。同样，在 printMultiplicationTable 方法中，你也应该从索引 0 开始循环。这样应该能够得到正确的格式。
英文:
The current code I have is outputting an incorrect format of my intended multiplication table. It outputs the current table :
public static void main(String[] args) {
System.out.println();
int[][] smallTable = createMultiplicationTable(3);
printMultiplicationTable(smallTable);
System.out.println();
int[][] largeTable = createMultiplicationTable(10);
printMultiplicationTable(largeTable);
}
//Create and return a multiplication table witn n rows and n columns
public static int[][] createMultiplicationTable(int n) {
int max = n;
int[][]table = new int[max][max];
for (int i = 1; i < max; i++) {
for (int j = 1; j < max; j++) {
table[i][j] = i * j;
}
}
return table;
}
//Print multiplication table using %4d to print each value
public static void printMultiplicationTable(int[][] table) {
int max = table.length;
for (int i = 0; i < max; i++) {
for (int j = 0; j < max; j++) {
System.out.printf("%4d", table[i][j]);
}
System.out.println();
}
}
}
The correct format is suppose to look as so:
Where in my code am I creating an error?
答案1
得分: 0
当你像这样声明一个 int 数组：
int[][] table = new int[max][max];
所有元素都有默认/初始值为零，由于你只在循环中为大于一的索引 i、j 赋值，具有索引 0、i 或 0、j 的元素保持不变。像下面这样做一个小改变就能得到你想要的结果：
public static int[][] createMultiplicationTable(int n) {
int max = n;
int[][] table = new int[max][max];
for (int i = 0; i < max; i++) {
for (int j = 0; j < max; j++) {
table[i][j] = (i+1) * (j+1);
}
}
return table;
}
英文:
When you declare an int array as you did here:
int[][]table = new int[max][max];
all elements have a default/initial value of zero and since you only assign values to indices i,j greater than one in your for loop, the elements with indices 0,i or 0,j remain unchanged. A small change like below should give you the desired result
public static int[][] createMultiplicationTable(int n) {
int max = n;
int[][]table = new int[max][max];
for (int i = 0; i < max; i++) {
for (int j = 0; j < max; j++) {
table[i][j] = (i+1) * (j+1);
}
}
return table;
}
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