View Compilation Error

0_0_21596543_31124.cpp:31:21: error: stray '#' in program
         s[sa[1]]=k+'a';
                     ^
0_0_21596543_31124.cpp:31:27: error: stray '#' in program
         s[sa[1]]=k+'a';
                           ^
0_0_21596543_31124.cpp:36:25: error: stray '#' in program
             s[sa[i]]=k+'a';
                         ^
0_0_21596543_31124.cpp:36:31: error: stray '#' in program
             s[sa[i]]=k+'a';
                               ^
0_0_21596543_31124.cpp: In function 'int main()':
0_0_21596543_31124.cpp:31:22: error: lvalue required as unary '&' operand
         s[sa[1]]=k+'a';
                      ^
0_0_21596543_31124.cpp:31:25: error: 'a' was not declared in this scope
         s[sa[1]]=k+'a';
                         ^
0_0_21596543_31124.cpp:36:26: error: lvalue required as unary '&' operand
             s[sa[i]]=k+'a';
                          ^