View Compilation Error

0_0_4219716_655.cpp: In function `bool search(int, int)':
0_0_4219716_655.cpp:19: error: `swap' undeclared (first use this function)
0_0_4219716_655.cpp:19: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_4219716_655.cpp: In function `int main()':
0_0_4219716_655.cpp:28: error: `scanf' undeclared (first use this function)
0_0_4219716_655.cpp:32: error: `memset' undeclared (first use this function)
0_0_4219716_655.cpp:53: error: `printf' undeclared (first use this function)