View Compilation Error

1_277_3707_30782.c: In function `main':
1_277_3707_30782.c:17: error: `true' undeclared (first use in this function)
1_277_3707_30782.c:17: error: (Each undeclared identifier is reported only once
1_277_3707_30782.c:17: error: for each function it appears in.)