View Compilation Error

0_0_29409800_21550.cpp: In function 'int main()':
0_0_29409800_21550.cpp:26:22: error: expected primary-expression before '<' token
     if(-c/b>0)       <span style="font-size: 12.380952835083px; font-family: Arial, Helvetica, sans-serif;">//判断答案的正负</span>
                      ^
0_0_29409800_21550.cpp:26:23: error: 'span' was not declared in this scope
     if(-c/b>0)       <span style="font-size: 12.380952835083px; font-family: Arial, Helvetica, sans-serif;">//判断答案的正负</span>
                       ^