View Compilation Error

670649_0_0_27936.cpp: In function `int main()':
670649_0_0_27936.cpp:11: error: `strrev' undeclared (first use this function)
670649_0_0_27936.cpp:11: error: (Each undeclared identifier is reported only once for each function it appears in.)
670649_0_0_27936.cpp:18: error: expected `}' at end of input