View Compilation Error

1073717_0_0_7208.cpp:5: error: `main' must return `int'
1073717_0_0_7208.cpp: In function `int main(...)':
1073717_0_0_7208.cpp:7: error: `cin' undeclared (first use this function)
1073717_0_0_7208.cpp:7: error: (Each undeclared identifier is reported only once for each function it appears in.)
1073717_0_0_7208.cpp:12: error: `itoa' undeclared (first use this function)
1073717_0_0_7208.cpp:13: error: `cout' undeclared (first use this function)
1073717_0_0_7208.cpp:13: error: `endl' undeclared (first use this function)