Finding crossed words (uncommented)

#include <iostream>
using namespace std;

bool checkV(char * C, int m, int n, char * P, int lung, int posM, int posN){
  for (int j=posN; j<posN+lung; j++){
    int startM = posM-(j-posN);
    int c = 0;
    if (startM>=0 && startM+lung<=m)
      for (int i=startM; i<startM+lung; i++){
    if (C[i*n+j]==P[c]){
      if (c==lung-1) return true;
      c++;
    }
      }
  }
  return false;
}

bool check(char * C, int m, int n, char * P, int lung){
  for (int i=0; i<m; i++){
    int c = 0;
    for (int j=0; j<n; j++){
      if (C[i*n+j]==P[c]){
    if (c==lung-1 && checkV(C, m, n, P, lung, i, j-c))
      return true;
    c++;
      }else if (n-j<=lung){
    break;
      }
    }
  }
  return false;
}



int main(){
  int m = 6, n=8;
  char C[48] = {
    'a', 's', 'd', 'p', 'g', 'h', 'j', 'p',
    'e', 'r', 'p', 'i', 'p', 'p', 'o', 'i',
    'r', 'r', 'i', 'l', 'h', '5', 'r', 'p',
    'y', 'y', 'p', 'p', 'i', 'p', 'p', 'p',
    't', 'y', 'o', 'p', 'i', 'p', 'p', 'o',
    'f', 'g', 'r', 'w', 'a', 'r', 'g', 'h'
  };
  int lung = 5;
  char P[5] = {'p', 'i', 'p', 'p', 'o'};

  cout << check(&C[0], m, n, &P[0], lung) << "\n";


}