How to extract a single character from the elements in vector<char*>?-CodePudding

I am trying to extract a single element from a string literal included a list composed of string literals. I used VS Code.

First, I used pointer to make the array of string literals and succeeded in the extracting particular single character in C.

I ran following code to check this:

#include <stdio.h>

int main()
{ 
  char* list[]={"abc","def","ghi"};
  printf("%c\n",list[1][1]);
  return 0;
}

Then, I tried to use vector instead of array to make the list consists of string literals in C .
I ran following code but failed:

#include <bits/stdc  .h>
using namespace std;

int main()
{
  vector<const char*> list;
  list = {"abc", "def", "ghi"};
  for (int i = 0; i < 3; i  ){
    const char* temp = list[i];
    cout<<temp[3]<<endl;
  }
  return 0;
}

When I ran the code above, just blank was displayed:

I also tried changing const char* to char*, but it didn't worked well, too.

#include <bits/stdc  .h>
using namespace std;

int main()
{
  vector<char*> list;
  list = {"abc", "def", "ghi"};
  for (int i = 0; i < 3; i  ){
    char* temp = list[i];
    cout<<temp[3]<<endl;
  }
  return 0;
}

I am not sure why my codes does not work well to extract the single character included the element of list. Could you please tell me the reason why my didn't work well?
I appreciate if you could help me.

Notations
Based on the comments, I revised my code. I changed char* to string as following:

#include <bits/stdc  .h>
using namespace std;

int main()
{
  vector<string> list;
  list = {"abc", "def", "ghi"};
  for (int i = 0; i < 3; i  ){
    string temp = list[i];
    cout<<temp[3]<<endl;
  }
  return 0;
}

However, the output is also blank as well.

CodePudding user response：

temp[3] is null character. the literal "abc" means the array {'a', 'b', 'c', '\0'}.

Change

cout<<temp[3]<<endl;

cout<<temp[2]<<endl;

CodePudding user response：

you are using temp[3] but "abc" means an array of size 4 as follows:

{'a', 'b', 'c', '\0'}

Where '\0' represents the termination of the string. So temp[3] is same as '\0'.

Please use temp[2] instead to access the last character of the string.