杨辉三角
Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)
Total Submission(s): 84819 Accepted Submission(s): 34682
Problem Description
还记得中学时候学过的杨辉三角吗?具体的定义这里不再描述,你可以参考以下的图形:
1
1 1
1 2 1
1 3 3 1
1 4 6 4 1
1 5 10 10 5 1
Input
输入数据包含多个测试实例,每个测试实例的输入只包含一个正整数n(1<=n<=30),表示将要输出的杨辉三角的层数。
Output
对应于每一个输入,请输出相应层数的杨辉三角,每一层的整数之间用一个空格隔开,每一个杨辉三角后面加一个空行。
Sample Input
2 3
Sample Output
1
1 1
1
1 1
1 2 1
源代码如下
#include<iostream>
using namespace std;
int main()
{
int a[30][30];
int n;
while (cin >> n)
{
for (int i = 0; i < 30; i++)
for (int j = 0; j < 30; j++)
a[i][j] = 0;
for (int i = 0; i < 30; i++)
a[i][0] = 1;
int b = 1;
for (int i = 1; i <= b, b < n; i++, b++)
for (int j = 1; j <= i; j++)
a[i][j] = a[i-1][j] + a[i - 1][j - 1];
int c = 1;
for (int i= 0; i < 1, c <= n; i++, c++)
{
for (int j = 0; j <= i; j++)
{
if (j != 0)
cout << " ";
cout << a[i][j];
}
cout << endl;
}
cout << endl;
}
return 0;
}