Store texts in char array then compare the contents of array - c++

Question

I'm trying to figure out how I can store to the char array the user input. For example user input: hello, then char array[0] = "hello"; then when he input again "hello" it will not insert to the char array since it's already on the array.
Input: hello
Output: char array[] = {"hello"};
Input: world
Output:
char array[] = {"hello","world"};
Input: hello
checks: array[i] == "hello"
Output: don't insert to char array
I need a sample program please

Answer 1

You might go with more C++-way using standard containers:
#include <iostream>
#include <set>
#include <string>
int main()
{
std::string buffer;
std::set<std::string> data;
std::cin >> buffer;
while (buffer != "quit")
{
if (data.find(buffer) == data.end())
{
auto res = data.insert(buffer);
if (! res.second)
std::cerr << "ERROR:: Could not insert string '" << buffer << "'." << std::endl;
}
else
std::cout << "WARNING:: String '" << buffer << "' already found." << std::endl;
std::cin >> buffer;
}
return 0;
}
Otherwise, you should do it in C-style of thinking:
store string into buffer
allocate new char array and put it into a list of arrays
traverse through the list to find if a string is already there using strcmp() function
don't forget to clean up any dynamically allocated memory at the end of your program - this would cause memory leaks

Answer 2

The sample code using c++ would be like this, because this is C++ not only C we can use the features C++ provide as std::string, std::vector and many other useful algorithms like std::find implemented in STL. Hope this is what you want.
#include <string> // for std::string
#include <vector> // for std::vector
#include <iostream> // for std::cout, std::cin, and std::endl;
#include <algorithm> // for std::find
int main() {
std::vector<std::string> array;
std::string line;
std::cout << "Input : ";
while(std::getline(std::cin, line)) {
if (std::find(array.begin(), array.end(), line) == array.end()) { // If we can't find the string in the array
array.push_back(line);
std::cout << "{ ";
for (std::string str: array) {
std::cout << str << ", ";
}
std::cout << "}" << std::endl;
} else {
std::cout << "Output : Don't Insert" << std::endl;
}
}
}