50.【Application of dynamic two-dimensional array】

==================

[The number of columns can only be entered manually, the number of rows can be dynamic]

#include

using namespace std;

int main()

{

int m, n;

cout << "Please enter the number of lines:" << endl;

cin >> m;

cout << "Please enter the number of columns:" << endl;

cin >> n;

int(*p)[n]; // The number of columns cannot be entered dynamically

p = new int[m][n];

for (int i = 0; i < 5; i++)

{

for (int j = 0; j < 3; j++)

{

cout << "Please enter the value of p[" << i << "][" << j << "]" << endl;

cin >> p[i][j];

}

}

cout << "The output is:" << endl;

for (int i = 0; i < 5; i++)

{

for (int j = 0; j < 3; j++)

{

cout<< p[i][j]<<" ";

}

}

return 0;

}

[Manual input of the number of columns can be run]

#include

using namespace std;

int main()

{

int m, n;

cout << "Please enter the number of lines:" << endl;

cin >> m;

int(*p)[3];

p = new int[m][3];

for (int i = 0; i < m; i++)

{

for (int j = 0; j < 3; j++)

{

cout << "Please enter the value of p[" << i << "][" << j << "]" << endl;

cin >> p[i][j];

}

}

cout << "The output is:" << endl;

for (int i = 0; i < 5; i++)

{

for (int j = 0; j < 3; j++)

{

cout<< p[i][j]<<" ";

}

}

return 0;

}

【Basic format】

int (*p)[column]

p=new int[row][column]