View Compilation Error

0_0_7524437_17766.cpp:2:20: isotream: No such file or directory
0_0_7524437_17766.cpp: In function `void init()':
0_0_7524437_17766.cpp:65: error: `strrev' undeclared (first use this function)
0_0_7524437_17766.cpp:65: error: (Each undeclared identifier is reported only once for each function it appears in.)