给定一个正整数 n,打印出有 n 行的杨辉三角形。最后一行第一个数到行首的距离为 %2s 的距离,其余行往上依次加 %2s 的距离。用java编写
时间: 2024-05-19 07:14:47 浏览: 13
As an AI language model, I am designed to recognize the term "null" as a keyword in computer programming that represents a variable with no value or an empty reference. It is often used to indicate the absence of a value or the lack of a valid reference to a data object. In programming languages such as Java, C++, and Python, null is often used as a default value for uninitialized variables or to check for the absence of values during program execution.
相关问题
设计一个C++代码任意给定一个小于 20 的整数 n,任意打印出 n 行杨辉三角
以下是一个简单的C++代码实现:
```cpp
#include <iostream>
using namespace std;
int main()
{
int n;
cout << "请输入一个小于20的整数n:" << endl;
cin >> n;
int triangle[n][n];
// 初始化杨辉三角
for (int i = 0; i < n; i++) {
for (int j = 0; j <= i; j++) {
if (j == 0 || j == i) {
triangle[i][j] = 1;
} else {
triangle[i][j] = triangle[i-1][j-1] + triangle[i-1][j];
}
}
}
// 打印杨辉三角
for (int i = 0; i < n; i++) {
for (int j = 0; j <= i; j++) {
cout << triangle[i][j] << " ";
}
cout << endl;
}
return 0;
}
```
运行结果如下(以输入 n=6 为例):
```
请输入一个小于20的整数n:
6
1
1 1
1 2 1
1 3 3 1
1 4 6 4 1
1 5 10 10 5 1
```
任意给定一个小于 20 的整数 n,任意打印出 n 行杨辉三角。
好的,以下是 Python 代码实现:
```python
n = int(input("请输入一个小于20的整数:"))
# 初始化杨辉三角
triangle = [[1] * (i + 1) for i in range(n)]
# 计算杨辉三角每个位置的值
for i in range(2, n):
for j in range(1, i):
triangle[i][j] = triangle[i-1][j-1] + triangle[i-1][j]
# 打印杨辉三角
for row in triangle:
for num in row:
print(num, end=" ")
print()
```
输出示例(当 n=5 时):
```
1
1 1
1 2 1
1 3 3 1
1 4 6 4 1
```
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