View Compilation Error

0_0_9760614_21370.cpp: In function `int main()':
0_0_9760614_21370.cpp:61: error: `hash' undeclared (first use this function)
0_0_9760614_21370.cpp:61: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_9760614_21370.cpp:62: error: name lookup of `u' changed for new ISO `for' scoping
0_0_9760614_21370.cpp:61: error:   using obsolete binding at `u'