View Compilation Error

355163_0_25023.cpp:5: error: `main' must return `int'
355163_0_25023.cpp: In function `int main(...)':
355163_0_25023.cpp:20: error: `cout' undeclared (first use this function)
355163_0_25023.cpp:20: error: (Each undeclared identifier is reported only once for each function it appears in.)
355163_0_25023.cpp:20: error: `endl' undeclared (first use this function)