dev C de çarpmada hata veriyor, yardım

 
  #include <stdio.h> 
  #include <stdlib.h> 
  #include <conio.h> 
  #include <time.h> 
   
  int a, i=0, j=0, k=0; 
  int c[1000][1000], d[1000][1000], e[1000][1000]; 
  void matris_top (int c[1000][1000]); 
  void matris_fark (int d[1000][1000]); 
  void matris_carp (int e[1000][1000]); 
  int matris1 [1000][1000], matris2 [1000][1000]; 
   
  int main() 
  { 
      printf("Matrisin satir ve sutun sayisini giriniz: \n"); 
      scanf("%d", &a); 
       
      srand(time(NULL)); 
       
      for (i=0;i<a;i++) 
      { 
          for (j=0;j<a;j++) 
          { 
              matris1[i][j] = rand()% 100 - 50; 
              matris2[i][j] = rand()% 100; 
          } 
      } 
   
      printf ("1. Matris\n"); 
      for (i=0;i<a;i++) 
      { 
          for (j=0;j<a;j++) 
              printf (" %d ", matris1[i][j]); 
          printf ("\n"); 
      } 
   
      printf ("\n"); 
   
      printf ("2. Matris\n"); 
      for (i=0;i<a;i++) 
      { 
          for (j=0;j<a;j++) 
              printf (" %d ", matris2[i][j]); 
          printf ("\n"); 
      } 
   
      printf ("\n"); 
   
      matris_top (c); 
      printf ("Matrislerin toplami\n"); 
      for (i=0;i<a;i++) 
      { 
          for (j=0;j<a;j++) 
              printf (" %d ", c[i][j]); 
          printf ("\n"); 
      } 
   
      matris_fark (d); 
      printf ("Matrislerin farki\n"); 
      for (i=0;i<a;i++) 
      { 
          for (j=0;j<a;j++) 
              printf (" %d ", d[i][j]); 
          printf ("\n"); 
      } 
   
      matris_carp(e); 
      printf ("Matrislerin carpimi\n"); 
      for (i=0;i<a;i++) 
      { 
          for (j=0;j<a;j++) 
              printf (" %d ", e[i][j]); 
          printf ("\n"); 
      } 
   
      system ("PAUSE"); 
      return 0; 
  } 
   
  void matris_top (int c[1000][1000]) 
  { 
      i=0; 
      j=0; 
      for (i=0;i<a;i++) 
          for (j=0;j<a;j++) 
              c[i][j] = matris1[i][j] + matris2[i][j]; 
  } 
  void matris_fark (int d[1000][1000]) 
  { 
      i=0; 
      j=0; 
      for (i=0;i<a;i++) 
          for (j=0;j<a;j++) 
              d[i][j] = matris1[i][j] - matris2[i][j]; 
  } 
  void matris_carp (int e[1000][1000]) 
  { 
      i=0; 
      j=0; 
      k=0; 
      for (i=0;i<a;i++) 
          for (j=0;j<a;j++) 
              for (k=0;k<a;k++) 
                  e[i][j] = e[i][j] + matris1[i][k] * matris2[k][j]; 
  }