в 14:21, 25 мая 2010

2010-05-25T14:21:06Z

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2010-05-25T10:24:15Z

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==Create a two-dimensional array of objects.==

<source lang="cpp">

#include <iostream>
using namespace std;
class MyClass {
int a;
public:
MyClass(int n) {
a = n;
}
int getA() {
return a;
}
};
int main()
{
MyClass ob[4][2] = {
1, 2,
3, 4,
5, 6,
7, 8
};
int i;

for(i = 0; i <4; i++) {
cout << ob[ i ][0].getA() << " ";
cout << ob[ i ][1].getA() << endl;
}
cout << endl;
return 0;
}

</source>

==Define and initiate a two-dimensional array==

<source lang="cpp">

#include <iostream>
#include <iomanip>
using namespace std;
int matrix[3][5] = { { 215, 314, 216, 112, 8 },
{ 119, 217, 214, 111, 4 },
{ 61, 115, 315, 316, 118 } };
int rowsum[3];
int colsum[5];

int matrixsum( int arr2D[][5], int vlen, int rsum[], int csum[]);
int main()
{
cout << "Testing the function matrixsum()." << endl;
int totalsum = matrixsum( matrix, 3, rowsum, colsum);
cout << "The matrix with the sums of rows and columns:" << endl;
int i,j;
for( i = 0 ; i < 3 ; ++i)
{ // matrix with row sums.
for( j = 0 ; j < 5 ; ++j)
cout << setw(8) << matrix[i][j];
cout << " | " << setw(8) << rowsum[i] << endl;
}
cout << endl;
for( j = 0 ; j < 5 ; ++j )
cout << setw(8) << colsum[j];
cout << " | " << setw(8) << totalsum << endl;
return 0;
}
int matrixsum( int v[][5], int len, int rsum[], int csum[])
{
int ro, co; // Row and column index

for( ro = 0 ; ro < len ; ++ro) // To compute row sums
{
rsum[ro] = 0;
for( co = 0 ; co < 5 ; ++co)
rsum[ro] += v[ro][co];
}
for(co = 0 ; co < 5 ; ++co) // Compute column sums
{
csum[co] = 0;
for( ro = 0 ; ro < len ; ++ro)
csum[co] += v[ro][co];
}
return (rsum[0] + rsum[1] + rsum[2]); // Total sum =
} // sum of row sums.

</source>

==Init two dimension class array==

<source lang="cpp">
#include <iostream>
using namespace std;
class MyClass {
int a, b;
public:
MyClass(int n, int m) {
a = n;
b = m;
}
int getA() {
return a;
}
int getB() {

return b;
}
};
int main()
{
MyClass ob[4][2] = {
MyClass(1, 2), MyClass(3, 4),
MyClass(5, 6), MyClass(7, 8),
MyClass(9, 10), MyClass(11, 12),
MyClass(13, 14), MyClass(15, 16)
};
int i;
for(i = 0; i <4; i++) {
cout << ob[ i ][0].getA() << " ";
cout << ob[ i ][0].getB() << endl;
cout << ob[ i ][1].getA() << " ";
cout << ob[ i ][1].getB() << endl;
}
cout << endl;
return 0;
}

</source>

==Multidimensional Arrays==

<source lang="cpp">
#include <iostream>
#include <iomanip>
using namespace std;
char representative[2][20] = {"AAAAAAAAAAAA",
"BBBBBBBBBBBB"};
int articleCount[2][5] = { { 120, 151, 130, 117, 144},
{150, 120, 190, 110, 188}
};
int main(){
for( int i=0; i < 2; i++ ){
cout <<"\nRepresentative: " << representative[i];
cout << "\nNumber of items sold: ";
for( int j = 0; j < 5; j++ )
cout << setw(6) << articleCount[i][j];
cout << endl;
}
return 0;
}

</source>

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