View Compilation Error

0_0_39888898_18423.cpp: In function 'int main(int, const char**)':
0_0_39888898_18423.cpp:15:8: error: expected primary-expression before '<' token
   15 |        <span style="white-space:pre;">  </span>
      |        ^
0_0_39888898_18423.cpp:15:9: error: 'span' was not declared in this scope
   15 |        <span style="white-space:pre;">  </span>
      |         ^~~~
0_0_39888898_18423.cpp:26:14: error: 'len' was not declared in this scope; did you mean 'len2'?
   26 |         for( len=0;len<max;len++){
      |              ^~~
      |              len2
0_0_39888898_18423.cpp:34:13: error: 'l' was not declared in this scope
   34 |         for(l=len;l<max;l++){
      |             ^
0_0_39888898_18423.cpp:34:15: error: 'len' was not declared in this scope; did you mean 'len2'?
   34 |         for(l=len;l<max;l++){
      |               ^~~
      |               len2
0_0_39888898_18423.cpp:49:19: error: 'l' was not declared in this scope
   49 |         for(int x=l-1;x>=0;x--)
      |                   ^