View Compilation Error

102291_0_16118.cpp:3: error: `main' must return `int'
102291_0_16118.cpp: In function `int main(...)':
102291_0_16118.cpp:5: error: `cin' undeclared (first use this function)
102291_0_16118.cpp:5: error: (Each undeclared identifier is reported only once for each function it appears in.)
102291_0_16118.cpp:6: error: `cout' undeclared (first use this function)
102291_0_16118.cpp:6: error: `endl' undeclared (first use this function)