1 #include <iostream>
2 #include <cstring>
3 using namespace std;
4
5 class Array2 {
6 private:
7 int** arr;
8 int row,col;
9 public:
10 Array2(int i = 0,int j = 0):row(i),col(j){
11 arr = new int*[row];
12 for(int k = 0;k < row;++ k)
13 arr[k] = new int[col];
14 }
15
16 ~Array2(){
17 for(int i = 0;i < row;++ i)
18 delete []arr[i];
19 delete []arr;
20 }
21
22 int* operator[](const int& i){
23 return arr[i];
24 }
25
26 int& operator()(const int& i,const int& j){
27 return arr[i][j];
28 }
29
30 Array2& operator=(Array2& a){
31 if(arr){
32 for(int i = 0;i < row;++ i)
33 delete []arr[i];
34 delete []arr;
35 }
36 row = a.row;
37 col = a.col;
38 arr = new int*[row];
39 for(int i = 0;i < row;++ i)
40 arr[i] = new int[col];
41 for(int i = 0;i < row;++ i)
42 for(int j = 0;j < col;++ j)
43 (*this)[i][j] = a[i][j];
44 return *this;
45 }
46 };
47
48 int main() {
49 Array2 a(3,4);
50 int i,j;
51 for( i = 0;i < 3; ++i )
52 for( j = 0; j < 4; j ++ )
53 a[i][j] = i * 4 + j;
54 for( i = 0;i < 3; ++i ) {
55 for( j = 0; j < 4; j ++ ) {
56 cout << a(i,j) << ",";
57 }
58 cout << endl;
59 }
60 cout << "next" << endl;
61 Array2 b; b = a;
62 for( i = 0;i < 3; ++i ) {
63 for( j = 0; j < 4; j ++ ) {
64 cout << b[i][j] << ",";
65 }
66 cout << endl;
67 }
68 return 0;
69 }
1 #include <iostream>
2 #include <cstring>
3 using namespace std;
4
5 class Array2 {
6 private:
7 int** arr;
8 int row,col;
9 public:
10 Array2(int i = 0,int j = 0):row(i),col(j){
11 arr = new int*[row];
12 for(int k = 0;k < row;++ k)
13 arr[k] = new int[col];
14 }
15
16 ~Array2(){
17 for(int i = 0;i < row;++ i)
18 delete []arr[i];
19 delete []arr;
20 }
21
22 int* operator[](const int& i){
23 return arr[i];
24 }
25
26 int& operator()(const int& i,const int& j){
27 return arr[i][j];
28 }
29
30 Array2& operator=(Array2& a){
31 if(arr){
32 for(int i = 0;i < row;++ i)
33 delete []arr[i];
34 delete []arr;
35 }
36 row = a.row;
37 col = a.col;
38 arr = new int*[row];
39 for(int i = 0;i < row;++ i)
40 arr[i] = new int[col];
41 for(int i = 0;i < row;++ i)
42 for(int j = 0;j < col;++ j)
43 (*this)(i,j) = a(i,j);
44 return *this;
45 }
46 };
47
48 int main() {
49 Array2 a(3,4);
50 int i,j;
51 for( i = 0;i < 3; ++i )
52 for( j = 0; j < 4; j ++ )
53 a[i][j] = i * 4 + j;
54 for( i = 0;i < 3; ++i ) {
55 for( j = 0; j < 4; j ++ ) {
56 cout << a(i,j) << ",";
57 }
58 cout << endl;
59 }
60 cout << "next" << endl;
61 Array2 b; b = a;
62 for( i = 0;i < 3; ++i ) {
63 for( j = 0; j < 4; j ++ ) {
64 cout << b[i][j] << ",";
65 }
66 cout << endl;
67 }
68 return 0;
69 }
1 #include <iostream>
2 #include <cstring>
3 using namespace std;
4
5 class Array2 {
6 private:
7 int** arr;
8 int row,col;
9 public:
10 Array2(int i = 0,int j = 0):row(i),col(j){
11 arr = new int*[row];
12 for(int k = 0;k < row;++ k)
13 arr[k] = new int[col];
14 }
15
16 ~Array2(){
17 delete []arr;
18 }
19
20 int* operator[](const int& i){
21 return arr[i];
22 }
23
24 int& operator()(const int& i,const int& j){
25 return arr[i][j];
26 }
27
28 Array2& operator=(Array2& a){
29 if(arr){
30 for(int i = 0;i < row;++ i)
31 delete []arr[i];
32 delete []arr;
33 }
34 row = a.row;
35 col = a.col;
36 arr = new int*[row];
37 for(int i = 0;i < row;++ i)
38 arr[i] = new int[col];
39 memcpy(arr,a.arr,sizeof(int)*row*col);
40 return *this;
41 }
42 };
43
44 int main() {
45 Array2 a(3,4);
46 int i,j;
47 for( i = 0;i < 3; ++i )
48 for( j = 0; j < 4; j ++ )
49 a[i][j] = i * 4 + j;
50 for( i = 0;i < 3; ++i ) {
51 for( j = 0; j < 4; j ++ ) {
52 cout << a(i,j) << ",";
53 }
54 cout << endl;
55 }
56 cout << "next" << endl;
57 Array2 b; b = a;
58 for( i = 0;i < 3; ++i ) {
59 for( j = 0; j < 4; j ++ ) {
60 cout << b[i][j] << ",";
61 }
62 cout << endl;
63 }
64 return 0;
65 }
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