a program to find a start index of a word in a phrase

findWord.cpp

#include <iostream>
#include <string>
using namespace std;

string getStringFromInput(int length);
int searchForTheQuery(string totalPhrase, string queryPhrase);

int main()
{
  int n, m;
  cout << "Please enter total length of string: ";
  cin >> n;
  cout << "Please enter length of query: ";
  cin >> m;
  string totalPhrase = getStringFromInput(n);
  string queryPhrase = getStringFromInput(m);
  int index = searchForTheQuery(totalPhrase, queryPhrase);
  if(index != -1) {
      cout << "Start index of query: " << index;
  }else {
      cout << "Index not found!";
  }
  return 0;
}

string getStringFromInput(int length) {
    string inputedString;
    while(true) {
        cout << "Please enter an string with length of " << length << ": ";
        cin >> inputedString;
        if(inputedString.size() == length) {
            break;
        }else {
            cout << "Length of the inputed string must be " << length << "!" << endl;
        }
    }
    return inputedString;
}

int searchForTheQuery(string totalPhrase, string queryPhrase) {
    for(int i = 0; i < totalPhrase.size(); i++) {
        char currentChar = totalPhrase[i];
        bool canQueryNextChar = i + 1 < totalPhrase.size();
        if(currentChar == queryPhrase[0] && canQueryNextChar && totalPhrase[i + 1] == queryPhrase[1]) {
            bool found = true;
            for(int j = 0; j < queryPhrase.size(); j++) {
                if(totalPhrase[i + j] != queryPhrase[j]) {
                    found = false;
                    break;
                }
            }
            if(found) {
                return i;
            }
        }
    }
    return -1; // not founded
}