View Compilation Error

360719_0_30299.cpp:3: error: `main' must return `int'
360719_0_30299.cpp: In function `int main(...)':
360719_0_30299.cpp:6: error: `cin' undeclared (first use this function)
360719_0_30299.cpp:6: error: (Each undeclared identifier is reported only once for each function it appears in.)
360719_0_30299.cpp:18: error: `cout' undeclared (first use this function)
360719_0_30299.cpp:19: error: `endl' undeclared (first use this function)