C#控制台循环控制语句的练习使用

1. 实现长方形
2. 直角三角形（4个）
3. 平行四边形
4. 等腰三角形
5. 空心平行四边形
6. 菱形
7. 9*9乘法表

1.实现长方形

for (int i = 0; i < 5; i++)
{
for (int j = 0; j < 5; j++)
{
Console.Write("*");
}
Console.WriteLine();
}
Console.WriteLine();
Console.WriteLine();`

2.直角三角形（4个）
2.1

for (int i = 0; i < 5; i++)
{
for (int j = 0; j <=i; j++)
{
Console.Write("*");
}
Console.WriteLine();
}
Console.WriteLine();
Console.WriteLine();

2.2

for (int i = 0; i < 5; i++)
{
for (int j = i; j <4; j++)
{
Console.Write(" ");
}
for (int k =0; k < i+1; k++)
{
Console.Write("*");
}
Console.WriteLine();
}
Console.WriteLine();
Console.WriteLine();

2.3

for (int i = 0; i < 5; i++)
{
for (int j = 0; j < 5-i; j++)
{
Console.Write("*");
}
Console.WriteLine();
}
Console.WriteLine();
Console.WriteLine();

2.4

for (int i = 0; i < 5; i++)
{
for (int j = 0; j < i; j++)
{
Console.Write(" ");
}
for (int k = i; k < 5; k++)
{
Console.Write("*");
}
Console.WriteLine();
}
Console.WriteLine();
Console.WriteLine();

3. 平行四边形

for (int i = 0; i < 5; i++)
{
for (int j = 0; j < i; j++)
{
Console.Write(" ");
}
for (int k = 0; k < 5; k++)
{
Console.Write("*");
}
Console.WriteLine();
}
Console.WriteLine();
Console.WriteLine();

4.等腰三角形

for (int i = 0; i < 5; i++)
{
for (int j = i; j < 4; j++)
{
Console.Write(" ");
}
for (int k = 0; k <= i; k++)
{
Console.Write("*");
}
for (int l = 0; l < i; l++)
{
Console.Write("*");
}
Console.WriteLine();
}
Console.WriteLine();
Console.WriteLine();

5.空心平行四边形

for (int i = 0; i < 5; i++)
{
for (int j = 0; j <i; j++)
{
Console.Write(" ");
}
for (int j = i; j <=i; j++)
{
Console.Write("*");
}
for (int k =i; k <i+4; k++)

{
if (i==0||i==4)
{
Console.Write("*");
}
else
{
Console.Write(" ");
}

}
for (int l = i; l <= i; l++)
{
Console.Write("*");
}

Console.WriteLine();
}
Console.WriteLine();
Console.WriteLine();

.

6.菱形

for (int w = 0; w < 5; w++)
{
for (int q = w; q < 4; q++)
{
Console.Write(" ");
}
for (int e = 0; e <= w; e++)
{
Console.Write("*");
}
for (int r = 0; r < w; r++)
{
Console.Write("*");
}
Console.WriteLine();
}

for (int i = 0; i < 4; i++)
{
for (int j = 0; j <= i; j++)
{
Console.Write(" ");
}
for (int k = i; k < 4; k++)
{
Console.Write("*");
}

for (int p = i; p <3 ; p++)
{
Console.Write("*");
}
Console.WriteLine
4000
();
}
Console.WriteLine();
Console.WriteLine();

7. 9*9乘法表

for (int i = 1; i <= 9; i++)
{
for (int j = 1; j <= i; j++)
{
Console.Write(i + "*" + j + "=" + i * j + "\t");
}
Console.WriteLine();
}
Console.WriteLine();
Console.WriteLine();