C++ program is crashing for some unknown reason

Question

I started learning C++ recently, and thought I would test my mettle with Project Euler problems. I solved the first two, but I am stuck on the third. It is compiling correctly without any errors, but it is crashing as soon as it is executed. I tried removing the nested for loops to isolate the problem, and it still crashed.

#include<iostream>
#include<math.h>
int main()
{
  float quot;
  int num = 0;
  int array[100];
  float next;

  for(int i = 0; i < 100; i++)
  {
      for (int j = 0; j < 100; j++)
      {
          if((i % j) == 0)
          {
            quot=j/i;
            num=num+1;
          }

          if (num=2)
          {
            array[i]=i;
          }
      }
  }

  for (int i = 0; i < 100; i++)
  {
    if((13195 % i) == 0)
    {
      std::cout << i;
    }
  }
}

Answer 1

In if((i%j)==0) if i and j are zero, your next line is dividing i and j. This is division by zero.