请大家看看这个程序错在哪？

Question

#include
#include
using namespace std;
int main(void)
{
char ch;
int i=1;
char *before = new char[1],*temp;
while (cin >> ch)
{
temp = new char[i];
temp[i - 1] = ch;
for (int j = 0; j < i - 1; j++)
temp[j] = before[j];
delete[] before;
before = temp;
++i;
}
for (int j = 0; j < i - 1; j++)
cout << temp[i];
}

Answer 1

最后

for (int j = 0; j < i - 1; j++)
 cout << temp[i];

错了吧，循环变量是j,应该是

for (int j = 0; j < i - 1; j++)
 cout << temp[j];

而且temp[i]是一个申请的存储空间（）