如何在VC中创建动态数组

如何在VC中创建动态数组

怎样给多维数组动态分配内存

//Allocate:

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

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

p[i] = new int[n];

//Use:

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

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

p[i][j] = i * j;

//Free:

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

delete[] p[i];

delete[] p;

1. 演示形为int[2][3]的二维动态数组

/////////////////////////////////////////////////////////////////// int n1, n2;

const int DIM1 = 2;

const int DIM2 = 3;

// 构造数组

int **ppi = new int*[DIM1];

for(n1 = 0; n1 < DIM1; n1++)

{

ppi[n1] = new int[DIM2];

}

// 填充数据

for(n1 = 0; n1 < DIM1; n1++)

{

for(n2 = 0; n2 < DIM2; n2++)

{

ppi[n1][n2] = n1 * 10 + n2;

}

}

// 输出

for(n1 = 0; n1 < DIM1; n1++)

{

for(n2 = 0; n2 < DIM2; n2++)

{

afxDump << "ppi[" << n1 << "][" << n2 << "] = "

<< ppi[n1][n2] << "\n";

}

}

// 释放数组

for(n1 = 0; n1 < DIM1; n1++)

{

delete [] ppi[n1];

}

delete [] ppi;

2. 三维动态数组（int[2][3][4]）

/////////////////////////////////////////////////////////////////// int n1, n2, n3;

const int DIM1 = 2;

const int DIM2 = 3;

const int DIM3 = 4;

// 构造数组

int ***ppi = new int**[DIM1];

for(n1 = 0; n1 < DIM1; n1++)

{

ppi[n1] = new int*[DIM2];

for(n2 = 0; n2 < DIM2; n2++)

{

ppi[n1][n2] = new int[DIM3];

}

}

// 填充数据

for(n1 = 0; n1 < DIM1; n1++)

{

for(n2 = 0; n2 < DIM2; n2++)

{

for(n3 = 0; n3 < DIM3; n3++)

{

ppi[n1][n2][n3] = n1 * 100 + n2 * 10 + n3;

}

}

}

// 输出

for(n1 = 0; n1 < DIM1; n1++)

{

for(n2 = 0; n2 < DIM2; n2++)

{

for(n3 = 0; n3 < DIM3; n3++)

{

afxDump << "ppi[" << n1 << "][" << n2 << "][" << n3 << "] = " << ppi[n1][n2][n3] << "\n";

}

}

}

// 释放数组

for(n1 = 0; n1 < DIM1; n1++)

{

for(n2 = 0; n2 < DIM2; n2++)

{

delete [] ppi[n1][n2];

}

delete [] ppi[n1];

}

delete [] ppi;

如何动态创建一个数组

如果是一维的，

int *arr; //可以是其它类型(char, float...)

arr = new int[n]; //n 必须是整型变量

二维的呢，这样来，

int **arr;

int n,m;

cin >> n >> m;

arr = new int*[n];

for(int i=0;i

上面的代码就可以通过动态输入n，m来实现二维数组的定义