View Compilation Error

0_0_7580405_22409.cpp: In function `int main()':
0_0_7580405_22409.cpp:43: error: `strdup' undeclared (first use this function)
0_0_7580405_22409.cpp:43: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_7580405_22409.cpp:43: error: `strrev' undeclared (first use this function)