Language: C++

#include <bits/stdc++.h>
using namespace std;

int main() {
  cin >> sx >> sy >> tx >> ty ;
  for (int i=0, i<tx-sx ; i++){
    cout << R ;
  }
  for (int i=0, i<ty-sy ; i++){
    cout << U ;
  }
  for (int i=0, i<tx-sx ; i++){
    cout << L ;
  }
  for (int i=0, i<ty-sy+1 ; i++){
    cout << D ;
  }
  
  for (int i=0, i<tx-sx+1 ; i++){
    cout << R ;
  }
  for (int i=0, i<ty-sy+1 ; i++){
    cout << U ;
  }
  cout << L << U;
  for (int i=0, i<tx-sx+1 ; i++){
    cout << L ;
  }
  for (int i=0, i<ty-sy+1 ; i++){
    cout << D ;
  }
  cout << R << enddl;
  

}


Compiler output:
a.cc: In function 'int main()':
a.cc:5:10: error: 'sx' was not declared in this scope
    5 |   cin >> sx >> sy >> tx >> ty ;
      |          ^~
a.cc:5:16: error: 'sy' was not declared in this scope
    5 |   cin >> sx >> sy >> tx >> ty ;
      |                ^~
a.cc:5:22: error: 'tx' was not declared in this scope; did you mean 'tm'?
    5 |   cin >> sx >> sy >> tx >> ty ;
      |                      ^~
      |                      tm
a.cc:5:28: error: 'ty' was not declared in this scope; did you mean 'tm'?
    5 |   cin >> sx >> sy >> tx >> ty ;
      |                            ^~
      |                            tm
a.cc:6:18: error: expected ';' before '<' token
    6 |   for (int i=0, i<tx-sx ; i++){
      |                  ^
      |                  ;
a.cc:6:18: error: expected primary-expression before '<' token
a.cc:7:13: error: 'R' was not declared in this scope
    7 |     cout << R ;
      |             ^
a.cc:9:18: error: expected ';' before '<' token
    9 |   for (int i=0, i<ty-sy ; i++){
      |                  ^
      |                  ;
a.cc:9:18: error: expected primary-expression before '<' token
a.cc:10:13: error: 'U' was not declared in this scope
   10 |     cout << U ;
      |             ^
a.cc:12:18: error: expected ';' before '<' token
   12 |   for (int i=0, i<tx-sx ; i++){
      |                  ^
      |                  ;
a.cc:12:18: error: expected primary-expression before '<' token
a.cc:13:13: error: 'L' was not declared in this scope
   13 |     cout << L ;
      |             ^
a.cc:15:18: error: expected ';' before '<' token
   15 |   for (int i=0, i<ty-sy+1 ; i++){
      |                  ^
      |                  ;
a.cc:15:18: error: expected primary-expression before '<' token
a.cc:16:13: error: 'D' was not declared in this scope
   16 |     cout << D ;
      |             ^
a.cc:19:18: error: expected ';' before '<' token
   19 |   for (int i=0, i<tx-sx+1 ; i++){
      |                  ^
      |                  ;
a.cc:19:18: error: expected primary-expression before '<' token
a.cc:20:13: error: 'R' was not declared in this scope
   20 |     cout << R ;
      |             ^
a.cc:22:18: error: expected ';' before '<' token
   22 |   for (int i=0, i<ty-sy+1 ; i++){
      |                  ^
      |                  ;
a.cc:22:18: error: expected primary-expression before '<' token
a.cc:23:13: error: 'U' was not declared in this scope
   23 |     cout << U ;
      |             ^
a.cc:25:11: error: 'L' was not declared in this scope
   25 |   cout << L << U;
      |           ^
a.cc:25:16: error: 'U' was not declared in this scope
   25 |   cout << L << U;
      |                ^
a.cc:26:18: error: expected ';' before '<' token
   26 |   for (int i=0, i<tx-sx+1 ; i++){
      |                  ^
      |                  ;
a.cc:26:18: error: expected primary-expression before '<' token
a.cc:29:18: error: expected ';' before '<' token
   29 |   for (int i=0, i<ty-sy+1 ; i++){
      |                  ^
      |                  ;
a.cc:29:18: error: expected primary-expression before '<' token
a.cc:30:13: error: 'D' was not declared in this scope
   30 |     cout << D ;
      |             ^
a.cc:32:11: error: 'R' was not declared in this scope
   32 |   cout << R << enddl;
      |           ^
a.cc:32:16: error: 'enddl' was not declared in this scope
   32 |   cout << R << enddl;
      |                ^~~~~