View Compilation Error

0_0_12635689_14824.c: In function `main':
0_0_12635689_14824.c:48: error: `bool' undeclared (first use in this function)
0_0_12635689_14824.c:48: error: (Each undeclared identifier is reported only once
0_0_12635689_14824.c:48: error: for each function it appears in.)
0_0_12635689_14824.c:48: error: syntax error before "is_ok"
0_0_12635689_14824.c:59: error: `is_ok' undeclared (first use in this function)
0_0_12635689_14824.c:59: error: `false' undeclared (first use in this function)
0_0_12635689_14824.c:91: error: syntax error before '/' token
0_0_12635689_14824.c:93: error: syntax error before '/' token
0_0_12635689_14824.c:99: error: syntax error before '/' token