View Compilation Error

824862_0_0_14231.c: In function `prime':
824862_0_0_14231.c:7: error: `true' undeclared (first use in this function)
824862_0_0_14231.c:7: error: (Each undeclared identifier is reported only once
824862_0_0_14231.c:7: error: for each function it appears in.)
824862_0_0_14231.c:10: error: `false' undeclared (first use in this function)