delete[] p出错

[wwqna]

#include <iostream>
using namespace std;

void split(char Names[], int);
int main()
{
char * names = "what is your name";
int len = strlen(names);
split(names, len);
return 0;
}

void split(char Names[], int lens)
{
int old = 0;
int i = 0;
for (i = 0; i < lens; i++)
{
if (Names[i] == '\0')
{
return;
}
else if (Names[i] == ' ')
{
char * subchars = new char[i - old];
memcpy(subchars, Names + old, i - old + 1);
subchars[i - old] = '\0';
cout << subchars <<endl;
//下面该句出错，不用memcpy操作，下面该句又正确
delete[] subchars;
old = i + 1;
}
}

char * subchars2 = new char[i - old + 1];
memcpy(subchars2, Names + old, i - old);
subchars2[i - old] = '\0';
cout << subchars2 <<endl;
delete[] subchars2;
}


请那位解释一下

[navi_dx]

老大,你内存越界了
subchars有i-old个元素,你拷了i-old+1个元素

[逸学堂]

char * subchars = new char[i - old+1];

[wwqna]

*_*, 谢谢两位了!