View Compilation Error

36914_0_2933.cpp:1:9: #include expects "FILENAME" or <FILENAME>
36914_0_2933.cpp:4: error: `main' must return `int'
36914_0_2933.cpp: In function `long int rfact(int)':
36914_0_2933.cpp:13: error: `exit' undeclared (first use this function)
36914_0_2933.cpp:13: error: (Each undeclared identifier is reported only once for each function it appears in.)