打印图形集合

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1x1=1
1x2=2 2x2=4
1x3=3 2x3=6 3x3=9
1x4=4 2x4=8 3x4=12 4x4=16
1x5=5 2x5=10 3x5=15 4x5=20 5x5=25
1x6=6 2x6=12 3x6=18 4x6=24 5x6=30 6x6=36
1x7=7 2x7=14 3x7=21 4x7=28 5x7=35 6x7=42 7x7=49
1x8=8 2x8=16 3x8=24 4x8=32 5x8=40 6x8=48 7x8=56 8x8=64
1x9=9 2x9=18 3x9=27 4x9=36 5x9=45 6x9=54 7x9=63 8x9=72 9x9=81
6 public static void Test06(int num)
{
string arr = null;
for (int i = 1; i < num; i++)
{
for (int j = 1; j <= i; j++)
{
//注释是另一种方法转换成字符串打印加快运算速率
Console.Write("{0}x{1}={2} ", j, i, i * j);

//arr += string.Format("{0}x{1}={2} ", j, i, i * j);
}
//if (num != 9)
//{
// arr += "\n";
//}
Console.WriteLine();
}
//Console.WriteLine(arr);

}

A
ABA
ABCBA
ABCDCBA
ABCDEDCBA
ABCDEFEDCBA
ABCDEFGFEDCBA
ABCDEFGHGFEDCBA
ABCDEFGHIHGFEDCBA
ABCDEFGHIJIHGFEDCBA

7. public static void Test07(int num)
{
for (int i = 0; i < num; i++)
{
for (int j = 0; j <2*i+1 ; j++)
{
if (j<=i)
{
Console.Write((char)('A'+j));
}
else
{
Console.Write((char)(('A' + i)-(j-i)));
}
}
Console.WriteLine();
}
}

1
121
12321
1234321
123454321
12345654321
1234567654321
123456787654321
12345678987654321
12345678910987654321

8. public static void Test08(int num )
{
for (int i = 0; i < num; i++)
{
for (int j = 0; j < 2*i+1; j++)
{
if (j <=i)
{
Console.Write(j+1);
}
else
{
Console.Write(i-(j-i)+1);
}
}
Console.WriteLine();
}
}

1
121
12321
1234321
123454321

9.public static void Test09(int num)
{
for (int i = 0; i < num; i++)
{
for (int j = 0; j <num-i-1 ; j++)
{
Console.Write(" ");
}
for (int j = 0; j < 2*i+1; j++)
{
if (j <=i)
{
Console.Write(j+1);
}
else
{
Console.Write(i+1-(j- i));
}
}
Console.WriteLine();
}
}

1
1 1
1 2 1
1 3 3 1
1 4 6 4 1

也叫杨辉三角

10. public static void Test10(int num)
{

int[,] arr =new int[num,num];
for (int i = 0; i < num; i++)
{
for (int j = 0; j <num-i-1; j++)
{
Console.Write(" ");
}
for (int j = 0; j <= i; j++)
{
if (j == 0 || j == i)
{
arr[i, j] = 1;
Console.Write(arr[i, j]+" ");
}
else
{
arr[i, j] = arr[i - 1, j] + arr[i - 1, j - 1];
Console.Write(arr[i, j]+" ");
}
}
Console.WriteLine();
}
}

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