C#控制台应用程序——穷举&迭代

穷举和迭代需要用到循环语句及其嵌套。

循环：

初始条件，循环条件，状态改变，循环体。

for(初始条件;循环条件;状态改变)
{
    循环体
}

打印圆点

namespace yuandian
{
    class Program
    {
        static void Main(string[] args)
        {
            ////5x5

            //for (int i = 1; i <= 5; i++)
            //{
            //    for (int a = 1; a <= 5; a++)
            //    {
            //        Console.Write("●");
            //    }
            //    Console.WriteLine();
            //}

            ////54321 左对齐

            //for (int i = 1; i <= 5;i ++ )
            //{
            //    for (int a=1;a<=6-i;a++)
            //    {
            //    Console.Write ("●");
            //    }
            //    Console.WriteLine();
            //}

            ////12345 左对齐

            //for (int i = 1; i <= 5; i++)
            //{
            //    for (int a = 1; a <= i; a++)
            //    {
            //        Console.Write("●");
            //    }
            //    Console.WriteLine();
            //}

            ////12345 右对齐

            //for (int a = 1; a <= 5; a++)
            //{
            //    for (int b = 1; b <= 5 - a; b++)
            //    {
            //        Console.Write("  ");
            //    }
            //    for (int c = 1; c <= a; c++)
            //    {
            //        Console.Write("●");
            //    }
            //    Console.WriteLine();
            //}

            ////54321右对齐

            //for (int a = 1; a <= 5; a++)
            //{
            //    for (int b = 1; b <= a-1 ; b++)
            //    {
            //        Console.Write("  ");
            //    }
            //    for (int c = 1; c <= 6-a; c++)
            //    {
            //        Console.Write("●");
            //    }
            //    Console.WriteLine();
            //}

            ////12345居中

            //for (int a = 1; a <= 4;a++ )
            //{
            //    for (int b = 1; b <= 4-a;b++ )
            //    {
            //        Console.Write("  ");
            //    }
            //    for (int c = 1; c <= 2*a-1;c++ )
            //    {
            //        Console.Write("●");
            //    }
            //    Console .WriteLine();
            //}

            //54321居中

            for (int a = 1; a <= 5;a++ )
            {
                for (int b=1;b<=a-1;b++ )
                {
                 Console .Write("  ");                
                }
                for (int c=1;c<=9-2*a;c++ )
                {
                Console .Write ("●");
                }
                Console.WriteLine();
            }
        }
    }
}

求100以内所有数的和。

namespace qiu100neizhengshudehe
{
    class Program1
    {
        static void Main(string[] args)
        {
            int sum = 0;
            for (int i = 1; i <= 100;i++ )
            {
                sum = sum + 1;
            }
            Console.WriteLine(sum);
        }
    }
}

 100以内与7有关的数。

namespace _7
{
    class Program
    {
        static void Main(string[] args)
        {
            for (int a = 1; a <= 100; a++)
            {
               if (a%7==0||a%10==7||a/10==7)
                {
                    Console.Write(a+"	");
                }
            }
        }
    }
}

穷举

namespace BaiJiBaiQian
{
    class Program
    {
        static void Main(string[] args)
        {
            for (int a = 1; a <= 50;a++ )
            {
                for (int b = 1; b <= 100;b++ )
                {
                    for (float  c = 1; c <= 100;c++ )
                    {
                        if (a*2+b*1+c *0.5==100)
                        {
                            Console.WriteLine("公鸡可以买" + a + "只，" + "母鸡可以买" + b + "只，" + "小鸡可以买" + c + "只，");
                        }
                    }
                }
            }
        }
    }
}

  

namespace BaiMaBaiDan
{
    class Program
    {
        static void Main(string[] args)
        {
            for (int a = 1; a <= 50;a++ )
            {
                for (int b = 1; b <= 100;b++ )
                {
                    for (float  c = 1; c <= 100;c++ )
                    {
                        if (a*2+b*1+c*0.5==100)
                        {
                            Console.WriteLine("大马需要" + a + "匹，" + "中马马需要" + b + "匹，" + "小马需要" + c + "匹，");
                        }
                    }
                }
            }
        }
    }
}

namespace GouWuKa
{
    class Program
    {
        static void Main(string[] args)
        {
            for (int a = 1; a <= 6;a++ )
            {
                for (int b = 1; b <= 50;b++ )
                {
                    for (int c = 1; c <= 20;c++ )
                    {
                        if (15*a +2*b +5*c ==100)
                        {
                            Console.WriteLine("洗发水可以买" + a + "件，" + "香皂可以买" + b + "件，" + "牙膏可以买" + c + "件，");
                        }
                    }
                }
            }
        }
    }
}

namespace YingBi
{
    class Program
    {
        static void Main(string[] args)
        {
            for (int a = 1; a <= 100;a++ )
            {
                for (int b = 1; b <= 50;b++ )
                {
                    for (int c = 1; c <= 20;c++ )
                    {
                        if (a * 1 + b * 2 + c * 5 == 100)
                        {
                            Console.WriteLine("一分钱硬币需要"+a+"枚，"+"二分钱硬币需要"+b+"枚，"+"五分钱硬币需要"+c+"枚，");
                        }
                    }
                }
            }
        }
    }
}

namespace ZhenChaBing
{
    class Program
    {
        static void Main(string[] args)
        {
            for (int a = 0; a <= 1; a++)
            {
                for (int b = 0; b <= 1; b++)
                {
                    for (int c = 0; c <= 1; c++)
                    {
                        for (int d = 0; d <= 1; d++)
                        {
                            for (int e = 0; e <= 1; e++)
                            {
                                for (int f = 0; f <= 1; f++)
                                    if (a + b >= 1 && a + d != 2 && a+e+f==2&&b + c != 1 && c + d == 1 && (d + e == 0 || d == 1))
                                    {
                                        Console.WriteLine("a=" + a + "	" + "b=" + b + "	" + "c=" + c + "	" + "d=" + d + "	" + "e=" + e + "	" + "f=" + f);
                                    }
                            }
                        }
                    }
                }
            }
        }
    }
}

迭代