Question

请帮我用c++动态的创建一个m*n的矩阵

要完整的代码
包括矩阵的输入和输出

Answer 1

int m=4, n=3;
float **mat = new float*[m];
for (int i=0; i<m; ++i) {
mat[i] = new float[n];
}

Answer 2

int **p = new int*[m];

for(int i =0; i < n; i++)
{
p[i] = new int[n];
}

Answer 3

#include <iostream>

using namespace std;

int main()
{
int i, j, m, n;
cin >> m >> n;
int **ia = new int *[m];

for (i = 0; i < m; ++i)
{
ia[i] = new int[n];

for (j = 0; j < n; ++j)
cin >> ia[i][j];
}

cout << endl;

for (i = 0; i < m; ++i)
{
for (j = 0; j < n; ++j)
cout << ia[i][j] << ' ';

cout << endl;
}

cout << endl;

return 0;
}