View Compilation Error

0_0_9897753_15468.c: In function `Isprime':
0_0_9897753_15468.c:16: error: `true' undeclared (first use in this function)
0_0_9897753_15468.c:16: error: (Each undeclared identifier is reported only once
0_0_9897753_15468.c:16: error: for each function it appears in.)
0_0_9897753_15468.c:20: error: `false' undeclared (first use in this function)
0_0_9897753_15468.c: In function `main':
0_0_9897753_15468.c:99: error: syntax error before '/' token