int len = 5; for (int i = 0; i < len; i++) { int print = i > len / 2 ? (len - i) * 2 - 1 : i * 2 + 1; Console.Write(new string(' ', (len - print) / 2)); Console.WriteLine(new string('*', print)); } /* * *** ***** *** * */
class Program { public static void printUpLine(int n) { for (int i = 1; i <= n; i++) { Console.Write("*"); } Console.WriteLine(); } public static void printDownLine(int n) { for (int i = 1; i <= n; i++) { Console.Write("*"); } Console.WriteLine(); } static void Main(string[] args) { for (int i = 1; i < 4; i++) { printUpLine(i); } Console.WriteLine("\n\n"); for (int i = 3; i > 0; i--) { printDownLine(i); } } }
int len = 6; int i = 1; while (i <= len) { int count = i > len / 2 ? (len - i) + 1 : i; Console.WriteLine(new string('*', count)); i++; } /* * ** *** *** ** * */
protected void Page_Load(object sender, EventArgs e) { for (int i = 0; i < 5;i++ ) { NewMethod(); }
} private void NewMethod() { int len = 6; int i = 1; while (i <= len) { int count = i > len / 2 ? (len - i) + 1 : i; Response.Write(new string('*', count)); Response.Write("<br />"); i++; } }
int len = 5;
for (int i = 0; i < len; i++)
{
int print = i > len / 2 ? (len - i) * 2 - 1 : i * 2 + 1;
Console.Write(new string(' ', (len - print) / 2));
Console.WriteLine(new string('*', print));
}
/*
*
***
*****
***
*
*/
class Program
{
public static void printUpLine(int n)
{
for (int i = 1; i <= n; i++)
{
Console.Write("*");
}
Console.WriteLine();
}
public static void printDownLine(int n)
{
for (int i = 1; i <= n; i++)
{
Console.Write("*");
}
Console.WriteLine();
} static void Main(string[] args)
{
for (int i = 1; i < 4; i++)
{
printUpLine(i);
}
Console.WriteLine("\n\n");
for (int i = 3; i > 0; i--)
{
printDownLine(i);
}
}
}
int i = 1;
while (i <= len)
{
int count = i > len / 2 ? (len - i) + 1 : i;
Console.WriteLine(new string('*', count));
i++;
}
/*
*
**
***
***
**
*
*/
.Select(x => new string(Enumerable.Repeat('*').ToArray()))
.ToArray();
string result1 = string.Join("\r\n", Enumerable.Range(0, 3).Select(x => source[x]).ToArray());
string result2 = string.Join("\r\n", Enumerable.Range(0, 3).Select(x => source[3 - x]).ToArray());
for (int i = 0; i < 3; i++)
{
Console.WriteLine(result1);
Console.WriteLine(result2);
}
static void Main(string[] args)
{
Console.WriteLine(GetTree(3, 3, false, false));
Console.WriteLine(GetTree(2, 3, true, false));
Console.WriteLine(GetTree(2, 3, true, true));
Console.Read();
}
/// <summary>
/// 打印星星
/// </summary>
/// <param name="rowMax">最大行数</param>
/// <param name="cellMax">最大列数</param>
/// <param name="block">行数按照块规则显示</param>
/// <param name="group">行数按照对称组规则显示</param>
/// <returns></returns>
static string GetTree(int rowMax, int cellMax, bool block, bool group)
{
int flag = 1;
StringBuilder str = new StringBuilder();
if (block) rowMax = rowMax * cellMax * (group ? 2 : 1);
for (int i = 0; i < rowMax; i++)
{
if (flag > cellMax || flag == 0)
{
flag = -(flag - 1);
}
str.AppendLine(new string('*', Math.Abs(flag)));
flag++;
}
return str.ToString();
}
三个调用的结果:
1.
*
**
***2.
*
**
***
***
**
*3.
*
**
***
***
**
*
*
**
***
***
**
*
{
for (int i = 0; i < 5;i++ )
{
NewMethod();
}
} private void NewMethod()
{
int len = 6;
int i = 1;
while (i <= len)
{
int count = i > len / 2 ? (len - i) + 1 : i;
Response.Write(new string('*', count));
Response.Write("<br />");
i++;
}
}