View Compilation Error

0_0_3069710_31168.c: In function `main':
0_0_3069710_31168.c:8: error: `bool' undeclared (first use in this function)
0_0_3069710_31168.c:8: error: (Each undeclared identifier is reported only once
0_0_3069710_31168.c:8: error: for each function it appears in.)
0_0_3069710_31168.c:8: error: syntax error before "l_alpha"
0_0_3069710_31168.c:17: error: `l_alpha' undeclared (first use in this function)
0_0_3069710_31168.c:17: error: `false' undeclared (first use in this function)
0_0_3069710_31168.c:18: error: `b_alpha' undeclared (first use in this function)
0_0_3069710_31168.c:19: error: `numeric' undeclared (first use in this function)
0_0_3069710_31168.c:20: error: `special' undeclared (first use in this function)
0_0_3069710_31168.c:28: error: syntax error before '/' token
0_0_3069710_31168.c:42: error: `true' undeclared (first use in this function)