View Compilation Error

0_0_33127912_17654.cpp: In function 'void update(int, int, int, int, int)':
0_0_33127912_17654.cpp:42:17: error: 'u' was not declared in this scope
     else        u
                 ^
0_0_33127912_17654.cpp:42:17: error: expected '}' at end of input