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2. FOR (. 3.5).
3. ( N , N ..) "" .
4. "", (. 3.6) .
5. "" .
6. (. 3.9).
7. (. . 1.10)
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for(;;) { }
15 30 . F=C*1.8+32;
class Program
{
static void Main(string[] args)
|
|
|
{
int i;
double F=0;
Console.WriteLine(" ");
for (i = 15; i <= 30; i++)
{
F = i * 1.8 + 32;
Console.WriteLine("={0} ={1}", i, F);
}
Console.Write("Press any key to continue... ");
Console.ReadKey(true);
}
}
foreach
, C/C++. C#. : .
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foreach( in )
{
//
}
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;
in ;
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3.6. ""
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, .
, :
_ [] _;
:
_ = new _ [ _ ];
- .
, 5 :
double[] x;
x = new double[5];
:
double[] x = new double[5];
, , .. ( 4,5,3,2,1):
double[] x = new double[5] { 4, 5, 3, 2, 1 };
, . : , .
:
double[] x = { 4, 5, 3, 2, 1 };
, ( ).
5 .
. n . . .
double []x = new double[5];
int i, n = x.Length;
Console.WriteLine(" {0} :", n);
for(i = 0; i < n; i++)
{
Console.Write("x[{0}] = ", i);
x[i] = double.Parse(Console.ReadLine());
}
double s = 0;
for(i = 0; i < n; i++)
s += x[i];
s /= n; //
for(i = 0; i < n; i++)
x[i] -= s;
Console.WriteLine(" :");
foreach(double r in x)
Console.WriteLine(r);
Console.Write("Press any key to continue... ");
Console.ReadKey(true);
()
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. , , . . A[2x3]. .
1) :
double[,] a = new double[2, 3];
2) , :
double[,] a = new double[2, 3] { { 2, 4, 0 }, { 1, 6, 4 } };
, , , .
:
double[,] a = new double[,] { { 2, 4, 0 }, { 1, 6, 4 } };
. A[2x3], .. . :
class Program
{
static void Main(string[] args)
{
const int n = 2;
const int m = 3;
double [,]a = new double[n, m];
int i, j;
Console.WriteLine(" A[{0}*{1}]:", n, m);
for(i = 0; i < n; i++)
for(j = 0; j < m; j++)
a[i, j] = double.Parse(Console.ReadLine());
double max = Math.Abs(a[0, 0]);
for(i = 0; i < n; i++)
for(j = 0; j < m; j++)
if(Math.Abs(a[i, j]) > max)
max = Math.Abs(a[i, j]);
Console.WriteLine("max = {0}", max);
for(i = 0; i < n; i++)
for(j = 0; j < m; j++)
a[i, j] /= max;
Console.WriteLine("M A[{0}*{1}] :", n, m);
for(i = 0; i < n; i++)
{
for(j = 0; j < m; j++)
Console.Write(a[i,j]+"\t ");
Console.WriteLine();
}
Console.Write("Press any key to continue... ");
Console.ReadKey(true);
}
}
. , . :
double[,,] V = new double[2, 3, 3];
, 3x3.
:
double[,,] V = new double[2, 3, 3]
{
{{2,4,0}, {1,6,4}, {5,3,3}},
{{2,1,6}, {1,8,5}, {0,2,7}}
};
:
double[,,] V =
{
{{2,4,0}, {1,6,4}, {5,3,3}},
{{2,1,6}, {1,8,5}, {0,2,7}}
};
, , , .
, , Array. . . x , a .
1) Length . , :
for (i = 0; i < x.Length; i++)
Console.WriteLine(x[i]);
2) Rank . :
int r = a.Rank;
Console.WriteLine("=" + r);
1) Sort() . . :
- :
Array.Sort(x);
- i- , k ( : 3 , 2-):
Array.Sort(x, 2, 3);
2) Reverse() :
Array.Reverse(x);
:
Array.Reverse(x, 0, 3);
3) BinarySearch () , . , . :
int t = 4;
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|
|
int j = Array.BinarySearch(x, t);
4) IndexOf () , , 4 x. , .
int j = Array.IndexOf(x, 4);
5) LastIndexOf () , , 4 x. , .
int j = Array.LastIndexOf(x, 4);
6) GetLength () .
0. , :
for (i = 0; i < a.GetLength(0); i++)
for (j = 0; j < a.GetLength(1); j++)
a[i, j] = double.Parse(Console.ReadLine());
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