C++筆記：習題 4.34 - 4.35
Exercise 4.34: Write a program to read strings into a vector. Now, copy that vector into an array of character pointers. For each element in the vector, allocate a new character array and copy the data from the vector element into that character array. Then insert a pointer to the character array into the array of character pointers. Exercise 4.35: Print the contents of the vector and the array created in the previous exercise. After printing the array, remember to delete the character arrays.
/* C++ Primer 習題 4.34 - 4.35
* By Ceeji
*/
#include <iostream>
#include <vector>
#include <string>
using namespace std;
typedef vector<string> vector_str;
int main()
{
string str;
vector_str strlist = vector_str();
while (getline (cin, str))
{
strlist.push_back (str);
}
// 複製 strlist (vector) 中的數據到 字符指針數組中。
char **sz = new char*[strlist.size ()];
vector_str::iterator iter = strlist.begin ();
int j = 0;
while (iter != strlist.end())
{
char * tmp = new char[(*iter).length ()+1];
for (int i = 0; i<(*iter).length (); i++)
*(tmp + i) = (*iter).at (i);
*(tmp + (*(iter++)).length ()) = NULL;
*(sz + j++) = tmp;
}
for (int i = 0; i<strlist.size(); i++)
{
cout << *(sz + i) << endl;
delete [] *(sz + i);
}
delete [] sz;
return 0;
}
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