View Compilation Error

678867_0_0_14413.cpp:3: error: `main' must return `int'
678867_0_0_14413.cpp: In function `int main(...)':
678867_0_0_14413.cpp:7: error: `j' undeclared (first use this function)
678867_0_0_14413.cpp:7: error: (Each undeclared identifier is reported only once for each function it appears in.)