View Compilation Error

0_0_7169388_8119.cpp: In function `int main()':
0_0_7169388_8119.cpp:17: error: `strrev' undeclared (first use this function)
0_0_7169388_8119.cpp:17: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_7169388_8119.cpp:30: error: name lookup of `k' changed for new ISO `for' scoping
0_0_7169388_8119.cpp:18: error:   using obsolete binding at `k'