View Compilation Error

0_0_10716660_28511.cpp: In function `int main()':
0_0_10716660_28511.cpp:19: error: `ncmp' undeclared (first use this function)
0_0_10716660_28511.cpp:19: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_10716660_28511.cpp:19: error: `sort' undeclared (first use this function)