c ++ Pascal's Triangle

#include<iostream>
using namespace std;
int main() {
	int a[10][10];//设置一个10*10的数组
	for (int i = 0; i < 10; i++) {
		for (int j = 0; j <= i; j++) {
			a[i][0] = a[i][i] = 1;//每行的第一个和最后一个=1
		}
	}
	for (int i = 2; i < 10; i++) {
		for (int j = 1; j < i; j++) {
			if (i != j)
				a[i][j] = a[i - 1][j - 1] + a[i - 1][j];//杨辉三角的公式，上一行两个数相加
		}
	}
	for (int i = 0; i < 10; i++) {
		for (int j = 0; j <= i; j++) {
			cout << a[i][j] << " ";//输出数组
		}
		cout << endl;//输出一行换一行
	}
	return 0;
}

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