关于 c:String 比较差异(适用于某些情况，有时不适用)

int main()
{
  int max_size = 100;
  char email[100] ="aheanstring4strinstringzil.comg";
  int pointer = 0;
  int i = 1;
  int j = 0;
  int len = 0;
  int chk = 0;
  char found1[7] ="string1";
  char found2[7] ="string2";
  char found3[7] ="string3";
  char found4[7] ="string4";
  char found5[7] ="string5";

  char user1[7] ="string1"; // 23        
  char user2[7] ="string2";// 19        
  char user3[7] ="string3"; // 14        
  char user4[7] ="string4"; // 16      
  char user5[7] ="string5";; // 15

  while (pointer != max_size && chk != 1)
  {

    for (j = 0;j<7; j++)
    {
      found1[j] = *(email+pointer+j);
    }

    if (strcmp(found1, user1) == 0){
      printf("Authorized User Found/
");
      chk = 1;
      continue;
    }

    for (j = 0;j<7; j++)
    {
      found2[j] = *(email+pointer+j);
    }

    if (strcmp(found2, user2) == 0){
      printf("Authorized User Found/
");
      chk = 1;
      continue;
    }

    for (j = 0;j<7; j++)
    {
      found3[j] = *(email+pointer+j);
    }

    if (strcmp(found3, user3) == 0){
      printf("Authorized User Found/
");
      chk = 1;
      continue;
    }

    for (j = 0;j<7; j++)
    {
      found4[j] = *(email+pointer+j);
    }

    if (strcmp(found4, user4) == 0){
      printf("Authorized User Found/
");
      chk = 1;
      continue;
    }

    for (j = 0;j<7; j++)
    {
      found5[j] = *(email+pointer+j);
    }

    if (strcmp(found5, user5) == 0){
      printf("Authorized User Found/
");
      chk = 1;
      continue;
    }

    pointer++;

  }
  printf("Check is %d, Pointer is %d/
",chk, pointer);
  return 0;
}