View Compilation Error

0_0_15235854_24808.cpp: In function 'void Quicksort(int*, int, int)':
0_0_15235854_24808.cpp:28:32: error: expected primary-expression before '/' token
     while (l < r && a[l] < key)/%2
                                ^
0_0_15235854_24808.cpp:28:33: error: expected primary-expression before '%' token
     while (l < r && a[l] < key)/%2
                                 ^
0_0_15235854_24808.cpp:28:34: error: expected '}' at end of input
     while (l < r && a[l] < key)/%2
                                  ^
0_0_15235854_24808.cpp:28:34: error: expected '}' at end of input