C++ 打印杨辉三角/贾宪三角/帕斯卡三角

#include <iostream>
#include <iomanip>
#include <windows.h>
#include <fstream>
#include <string>
using namespace std;
#define N 10

int main() {
    int a[N][N] = { 0 };
    
    for (int i = 0; i <N; i++) {
        for (int j = 0; j <=i; j++) {
            if (j==0 || i==j) {
                a[i][j] = 1;
            }
            else {
                a[i][j] = a[i - 1][j - 1] + a[i - 1][j];
            }
        }
    }

    for (int i = 0; i < N; i++) {
        cout << setw((N - i) * 2)<<a[i][0]; //设每个数字或每个空格占2个字符位
        for (int j = 1; j <= i; j++) {
            cout << setw(4)<< a[i][j];
        }
        cout << endl;
    }

    system("pause");
    return 0;
}