View Compilation Error

0_0_3228812_21045.c: In function `main':
0_0_3228812_21045.c:17: error: `bool' undeclared (first use in this function)
0_0_3228812_21045.c:17: error: (Each undeclared identifier is reported only once
0_0_3228812_21045.c:17: error: for each function it appears in.)
0_0_3228812_21045.c:17: error: syntax error before "sp"
0_0_3228812_21045.c:20: error: `sp' undeclared (first use in this function)
0_0_3228812_21045.c:20: error: `true' undeclared (first use in this function)