How can I make a function to find the word from sentence vectors?

#include <iostream>
#include <vector>
#include <cstring>
#include <ctime> 
#include <cstdlib> 
#include <string>
using namespace std;
 
void createVector(vector<char*> &);
void createSentence(vector<char*> &, vector<char*> & , vector<char*> &, vector<char*> & ,vector<char*> & ); 
void sortSentence(vector<char*> &);
void outputSentence(vector<char*> &);
 
///////////////////////////////////////////////////////////////////////////
void createVector(vector<char*> & sentence)
{
	int size1,size2,size3,size4;
 
	cout<<"enter size for article:"; 
	cin>> size1;
	vector<char*> article(size1);
	cout<<"enter size for noun:"; 
	cin>> size2;
	vector<char*> noun(size2);
	cout<<"enter size for verb:"; 
	cin>> size3;
	vector<char*> verb(size3);
	cout<<"enter size for preposition:"; 
	cin>> size4;
	vector<char*> preposition(size4);
 
	for(int i=0;i<size1;i++)
	{
		
		char buffer[256]; 
		cout<<"Type your article #" << (i+1)<< ":";
		cin>>buffer; 
		article[i] = new char[(strlen(buffer) +1)];
		strcpy(article[i],buffer);
 
	}
 
	//noun
	for(int i=0;i<size2;i++)
	{
		char buffer[256]; 
		cout<<"Type your noun #" << (i+1)<< ":";
		cin>>buffer; 
		noun[i] = new char[(strlen(buffer)+1)] ;
		strcpy(noun[i],buffer);;
 
	}
 
 
 
	//Verb
	for(int i=0;i<size3;i++)
	{
		char buffer[256]; 
		cout<<"Type your verb #" << (i+1)<< ":";
		cin>>buffer; 
		verb[i] = new char[(strlen(buffer)+1)] ;
		strcpy(verb[i],buffer);
 
	}
 
 
	//Preposition
	for(int i=0;i<size4;i++)
	{
		char buffer[256]; 
		cout<<"Type your Preposition #" << (i+1)<< ":";
		cin>>buffer; 
		preposition[i] = new char[(strlen(buffer)+1)] ;
		strcpy(preposition[i],buffer);;
 
	}
	createSentence(article,noun,verb,preposition,sentence);
 
}
 ///////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////
void createSentence(vector<char*> & article, vector<char*> & noun, vector<char*> & verb, vector<char*> &preposition, vector<char*> & sentence)
{
	srand (static_cast<int>(time(NULL)));
	for(vector<char*>::size_type x = 0; x < sentence.size(); x++)
	{
 
 
		int iarticle1 = rand() % (int)article.size();
		int iarticle2 = rand() % (int)article.size();
		int inoun1 = rand() %(int) noun.size();
		int inoun2 = rand() % (int)noun.size();
		int iverb  = rand() % (int)verb.size();
		int ipreposition = rand() % (int)preposition.size();
 
		sentence[x]=new char[strlen(article[iarticle1])+strlen(noun[inoun1])+strlen(verb[iverb])+strlen(preposition[ipreposition])+strlen(article[iarticle2])+strlen(noun[inoun2])+1];
		strcpy(sentence[x],article[iarticle1]);
		strcat(sentence[x]," ");
		strcat(sentence[x],noun[inoun1]);
		strcat(sentence[x]," ");
		strcat(sentence[x],verb[iverb]);
		strcat(sentence[x]," ");
		strcat(sentence[x],article[iarticle2]);
		strcat(sentence[x]," ");
		strcat(sentence[x],preposition[ipreposition]);
		strcat(sentence[x]," ");
		strcat(sentence[x],noun[inoun2]);
		strcat(sentence[x],".");
 
	}
 
}
///////////////////////////////////////////////////////////////
void outputSentence(vector<char*> & sentence)
{
 
for(int i=0; i < 20; i++)
{
	cout<< i+1 << '.';	
 
	cout<< sentence[i]<<endl;
 
}
 
}
///////////////////////////////////////////////////////////////
void sortSentence(vector<char*> & sentence)
{
     bool ended = false;
     char *temp;
     int size = (int)sentence.size();
 
      while (!ended)
      {
            ended = true;
            for (int i=0; i<size-1; i++)
            {
                  if (strcmp(sentence[i], sentence[i+1]) > 0)
                  {
                        temp = sentence[i];
                        sentence[i] = sentence[i+1];
                        sentence[i+1] = temp;
                        ended = false;
                  }
            }
      }
}
 
strindex (char *s, char *t)
{
 
}
 
///////////////////////////////////////////////////////////////
 
 
int main()
{
 	vector <char*> sentence(20);
	
   createVector(sentence);
   
   outputSentence(sentence);
   
   sortSentence(sentence);
   
   cout<<endl<<endl<<endl<<endl<<"AFTER SORTING"<<endl;
 
   outputSentence(sentence);
 
 
		system("pause");
}
 
////////////////////////////////////////////////////////////////////////////////////////////