C语言的动态内存分配问题
# include <stdio.h>
# include <malloc.h>
# include <iostream>
using namespace std;
int main()
{
int ** p; //定义一个多级指针
int i, j;
p=(int **)malloc(sizeof(int*)*3); //动态分配n个指针
for (i = 0; i < 3; i++)
p[i]=(int *)malloc(sizeof(int)); //让每个指针指向一快内存
for (i = 0; i < 3; i++)
{
for (j = 0; j < 3; j++)
{
p[i][j] = 10+i+j;
}
}
for (i = 0; i < 3; i++)
{
for (j = 0; j < 3; j++)
{
cout << p[i][j] << " ";
}
cout << endl;
}
for (i = 0; i < 3; i++)
for(j = 0; j < 3; j++)
free((*(p+i)+j));
free(p);
return 0;
}
