急用！！！

[wangcftxz]

1
121
12321
1234321
123454321
求C语言代码 最好可以自行设置行数

[wangcftxz]

是杨辉三角那种，不好 意思啊

[onecl1]

http://search.download.csdn.net/search/%E6%9D%A8%E8%BE%89%E4%B8%89%E8%A7%92

[sky198306]

用循环就可以吧,一是判断层数
二就是一个加循环一个减循环

[hailang_Boy]

仅供参考：
#include <iostream>
using namespace std;

int main()
{
	int iLen;

	while (1)
	{
		cout <<"please input triangle Lens(0 return):";
		cin >>iLen;

		if(0 == iLen || iLen >100)	//input 0 return 
		{
			break;
		}

		for (int i=1; i<=iLen; i++)
		{
			int iBlocks = 0;
			int iNums	= 0;
			/* print block sign */
			for (iBlocks = i; iBlocks<iLen; iBlocks++)
			{
				cout <<" ";
			}
			/* print left part , egs:123 */
			for ( iNums = 1; iNums<=i; iNums++)
			{
				cout <<iNums;
			}
			iNums -= 2;			
			/* print right part, egs:21  */
			for (; iNums>0; iNums--)
			{
				cout <<iNums;
			}
			cout <<endl;
		} //end for
	}//end while
	return 0;
}

[dingshaofengbinbin]

帮顶了！！！！

[alvyang]

全是高手啊！

[zecard_fu]

#include <stdio.h>
#define MAX_LINE 10
int i = 0;
void down(int n)
{
        printf("%d", n);
        if (n <= i) {
                down(n+1);
                printf("%d", n);
        }
}

int main()
{
        for (int j=0; j<MAX_LINE; j++) {
                i = j;
                down(1);
                printf("\n");
        }
        return 0;
}

帮顶~~