Experiment 7-2-6 Printing Yanghui's Triangle (20 points)

Experiment 7-2-6 Printing Yanghui's Triangle (20 points)
This question requires that the first N lines of Yanghui's triangle be printed according to the specified format.

Input format:
The input gives N in one line (1≤N≤10).

Output format:
Output the first N rows of Yanghui triangles in equilateral triangle format. Each number occupies a fixed 4 bits.

Input sample:
6

Sample output:
        1
       1   1
      1   2   1
     1   3   3   1
    1   4   6   4   1
   1   5  10  10   5   1


#include <stdio.h>
#define N 11 //The requirement of 10 lines can be completed, and the two-dimensional array is stored according to the subscript 1.
//Time: April 23, 2018 18:42:03
//Idea: first define a two-dimensional array a[][], and then initialize the array: first initialize all 1s of the boundary
// Reinitialize non-boundary elements. After initialization, control the output format.
// Note: The first 1 in the last line is directly output by %4d control, no additional spaces are required.
intmain()
{
	int i, j, k, n, a[N][N]; //Define a two-dimensional array a[11[11] with 11 rows and 11 columns
	scanf("%d", &n);

	for (i = 1; i <= n; i++) //initialize the boundary elements of the two-dimensional array elements
	{
		a[i][1] = a[i][i] = 1; //The numbers on both sides make it 1, because now the loop starts from 1, it is considered that a[i][1] is the first number
	}
	for (i = 3; i <= n; i++) //initialize non-boundary elements of two-dimensional array elements
	{
		for (j = 2; j <= i - 1; j++)
		{
			a[i][j] = a[i - 1][j - 1] + a[i - 1][j]; //Except the numbers on both sides are equal to the sum of the top two numbers
		}
	}

	for (i = 1; i <= n; i++) //Format control output, the last line is to directly output the first array element
	{
		for (k = 1; k <= n - i; k++)
		{
			printf("#"); //Print space placeholders before outputting array elements
		}
		for (j = 1; j <= i; j++) //output the elements in the initialized two-dimensional array
		{
			printf("%4d", a[i][j]);
		}
		printf("\n"); //When a line is output, wrap it
	}
	return 0;
}