c/c++多维数组动态分配与释放

如果对数组指针与指针数组不明白可以参看http://blog.csdn.net/whzhaochao/article/details/12911785

1.一维

函数内部

void main()
{
	int a[3]={1,2,3};
	int *b;
	b= new int[3];

	b[0]=*a;
	*(b+1)=a[1];
	b[2]=*(a+2);

	delete []b;

} 

函数外部

void  newArray(int *&a,int *b){
	a=new int[3];
	a[0]=*b;
	*(a+1)=b[1];
	a[2]=*(b+2);
}
void deleteArray(int *&a){
	delete []a;
}

void main(){

		int a[3]={1,2,3};
		int *b;
		newArray(b,a);
		deleteArray(b);
}

2.二维

函数内部

#include <stdio.h>

void main()
{
	int a[][3]={
		{1,2,3},
		{4,5,6},
		{7,8,9}
	};

	int (*p)[3]=new int[3][3];     //数据组指针
	int *q[3];                     //指针数组

	q[0]=a[0];
	q[1]=a[1];
	q[2]=a[2];

//	p=a;
	for (int i=0;i<3;i++)
	{
		for(int j=0;j<3;j++){
			p[i][j]=a[i][j];
		}
	}

	printf("
%d ",sizeof(a));     //36
	printf(" %d " ,sizeof(p));     //4
	printf(" %d 
" ,sizeof(*p));  //12

	delete []p;
} 

   

函数外部

void  newArray( int (*&p)[3],  int a[][3]){
	p=new int[3][3];
	for (int i=0;i<3;i++)
	{
		for(int j=0;j<3;j++){
			p[i][j]=a[i][j];
		}
	}

}
void deleteArray( int (*&p)[3]){
	delete []p;
}

void main()  
{  
    int a[][3]={  
        {1,2,3},  
        {4,5,6},  
        {7,8,9}  
    };  
    int (*p)[3];
	newArray(p,a);
	deleteArray(p);


}   

3.三维

函数内部

void main()
{
	int (*p)[3][2] =new int[4][3][2];
	for (int i=0;i<4;i++)
	{
		for (int j=0;j<3;j++)
		{
			for(int k=0;k<2;k++){
				p[i][j][k]=i+j+k;
				printf(" %d ",i+j+k);
			}
			printf("
");
		}
		printf("

");
	}
	delete []p;	
} 

函数外部

void  newArray( int (*&p)[3][2]){
	p=new int[4][3][2];
	for (int i=0;i<4;i++)
	{
		for (int j=0;j<3;j++)
		{
			for(int k=0;k<2;k++){
				p[i][j][k]=i+j+k;
				printf(" %d ",i+j+k);
			}
			printf("
");
		}
		printf("

");
	}

}
void deleteArray( int (*&p)[3][2]){
	delete []p;
}

void main()
{
	int (*p)[3][2] ;
	newArray(p);
	deleteArray(p);
}