Increase your Programming Skills Part -3

Here I have listed some questions related to strings in c++, solve them to increase your programming skills.
Problem #1:

  // Problem related to strings

  #include<iostream.h>

  void main(void)
  {
   char ch[]="Programming Skills";
   int i=0;

   cout<<ch[++i];
   cout<<ch[i++];
   cout<<i++[ch];
   cout<<++i[ch];
  }

Problem #2:

  // Problems related to strings

  #include<iostream.h>

  void main(void)
  {
   char ch[]="Programming Skills";
   char *s="Programming Skills";

   cout<<sizeof(ch)<<sizeof(s);
   cout<<sizeof(*ch)<<sizeof(*s);
  }

Problem #3:

  // Problems related to strings

  #include<iostream.h>

  void main(void)
  {
   int n[]={4,3,2,1,0};

   for(int i=0;i<5;i++)
     cout<<n[n[i]];
  }

Problem #4:

  // Problems related to strings

  #include<iostream.h>

  void main(void)
  {
   int n[]={11,10,9,8,7,6,5,4,3,2,1,0};
   char ch[]="C++ Language";

   for(int i=0;i<12;i++)
     cout<<ch[n[i]];
  }

ANSWERS:
#1: rroh
#2: 19411
#3: 01234
#4: egaugnaL ++C