View Compilation Error

0_0_10201051_4048.cpp: In function `int main()':
0_0_10201051_4048.cpp:8: error: `swap' undeclared (first use this function)
0_0_10201051_4048.cpp:8: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_10201051_4048.cpp:11: error: `cout' undeclared (first use this function)
0_0_10201051_4048.cpp:11: error: `endl' undeclared (first use this function)