C Practice Example 61 - Yang Hui Triangle
Title:Print out Pascal's triangle (requiring 10 rows to be printed).
Program analysis:
The structure is as follows:
1 1 1 1 2 1 1 3 3 1 1 4 6 4 1
Example
// Created by www.example.com on 15/11/9.
// Copyright © 2015 Example. All rights reserved.
//
#include <stdio.h>
int main()
{
int i,j;
int a[10][10];
printf("\n");
for(i=0;i<10;i++) {
a[i][0]=1;
a[i][i]=1;
}
for(i=2;i<10;i++)
for(j=1;j<i;j++)
a[i][j]=a[i-1][j-1]+a[i-1][j];
for(i=0;i<10;i++) {
for(j=0;j<=i;j++)
printf("%5d",a[i][j]);
printf("\n");
}
}
The output result of the above code execution is:
1 1 1 1 2 1 1 3 3 1 1 4 6 4 1 1 5 10 10 5 1 1 6 15 20 15 6 1 1 7 21 35 35 21 7 1 1 8 28 56 70 56 28 8 1 1 9 36 84 126 126 84 36 9 1other extensions