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using System;
class HelloWorld {
//1 6, 21
//2
public static int F1(int n1, int n2, int n3, int n4)
{
int count = 0;
if (n1 % 2 == 1 && n1 > 99 && n1 < 1000)
count += 1;
if (n2 % 2 == 1 && n2 > 99 && n2 < 1000)
count += 1;
if (n3 % 2 == 1 && n3 > 99 && n3 < 1000)
count += 1;
if (n4 % 2 == 1 && n4 > 99 && n4 < 1000)
count += 1;
return count;
}
//3
public static bool IsDigit(char ch)
{
if (ch >= '0' && ch <= '9')
return true;
else
return false;
//return (ch >= '0' && ch <= '9');
}
//4
public static int SumN(int n)
{
int total = 0;
for (int i = 0; i < n; i++)
{
Console.Write("enter number:");
int num = int.Parse(Console.ReadLine());
total += num;
}
return total;
}
//5
public static void Print3(string s, double d)
{
for (int i = 0; i < 3; i++)
{
Console.WriteLine("s:{0},d:{1}",s,d);
}
}
//6
public static int CountD(int n)
{
int total = 0;
while( n>0)
{
int d = n % 10;
n = n / 10;
total += d;
}
return total;
}
public static void test_F1()
{
Console.WriteLine(F1(101,101,101,1));
}
static void Main() {
Console.WriteLine("Hello World");
}
}
