View Compilation Error

195357_0_7450.c: In function `main':
195357_0_7450.c:4: error: `EOF' undeclared (first use in this function)
195357_0_7450.c:4: error: (Each undeclared identifier is reported only once
195357_0_7450.c:4: error: for each function it appears in.)
195357_0_7450.c:5: error: `PI' undeclared (first use in this function)