Why does the search for a word in a string not work?

Question

C++ / C#

Good day, I wrote in C ++ an algorithm for finding the first occurrence of a word in a string. The function should return the position number of the first occurrence of the word in the string:

#include <iostream>
using namespace std;
int search(char t[9], char p[3])
{
  int n = strlen(t), m = strlen(p), i = 0, j;
  
  while (i <= (n-m))  //<----------------------тут краш
  {
    j = 0;
    while ((t[i+j] = p[j]) && (j < m))
      j++;
    if (j = m)
      return i;
    i++;
  }
}

int main()
{
  cout << search("badbarrar", "bar");
  
  return 0;
}

The program starts executing and immediately crashes. If you replace (nm) with (mn) - then the program will be executed with the answer -6, which is naturally not correct, but at least it does not crash. What's the problem, thanks in advance.

Answer 1

int search(char t[9], char p[3])
Try like this:
int search(char t[], char p[])