View Compilation Error

0_0_1806600_19280.c: In function `main':
0_0_1806600_19280.c:15: error: `bool' undeclared (first use in this function)
0_0_1806600_19280.c:15: error: (Each undeclared identifier is reported only once
0_0_1806600_19280.c:15: error: for each function it appears in.)
0_0_1806600_19280.c:15: error: syntax error before "start"
0_0_1806600_19280.c:36: error: `start' undeclared (first use in this function)
0_0_1806600_19280.c:41: error: `true' undeclared (first use in this function)