Suppose we have: int a=100; (signed by default).
If we want to convert this to an unsigned long integer, we can do this by making the following small change:

void main()
{
      int const *p=5;
      printf("%d", ++(*p));
}

void main()
{
      char s[]="man";
      int i;
      for(i=0; s[i]; i++)
            printf("%c%c%c%c ", s[i], *(s+i), *(i+s), i[s]);
}

void main()
{
      float me = 1.1;
      double you = 1.1;
      if(me==you)
            printf("I hate Examveda");
      else
            printf("I love Examveda");
}

void main()
{
      static int var = 5;
      printf("%d ", var--);
      if(var)
            main();
}