【每日刷题】数据结构起步自测题 自测-1 打印沙漏

题目描述：

//自测-1
#include <stdio.h>
int main ( void )
{
	int n;
	char c;
	scanf( "%d %c", &n, &c );
	int row = 1, max_len = 1, sum;
	sum = 1;
	while( sum <= n ){
		max_len += 2;
		row++;
		sum += max_len * 2;
	}
	sum -= max_len * 2;
	max_len -= 2;
	row--;
	
	int i, j, k;
	int m = max_len;
	for( i = row; i > 0; i-- ){
		for( k = 0; k < ( max_len - m ) / 2; k++ )
				printf( " " );
		for( j = 1; j <= m; j++ ){
			printf( "%c", c );
		}
		printf( "\n" );
		m -= 2;
	}
	m = 3;
	for( i = 2; i <= row; i++ ){
		for( k = 0; k < ( max_len - m ) / 2; k++ )
				printf( " " );
		for( j = 1; j <= m; j++ ){
			printf( "%c", c );
		}
		printf( "\n" );
		m += 2;
	}
	printf( "%d", n - sum );
} 

感觉写的不是很简洁，尤其是开始求行数的那一部分代码，等再想起来回来简化一下。