View Compilation Error

685820_0_0_23199.c: In function `main':
685820_0_0_23199.c:10: error: `bool' undeclared (first use in this function)
685820_0_0_23199.c:10: error: (Each undeclared identifier is reported only once
685820_0_0_23199.c:10: error: for each function it appears in.)
685820_0_0_23199.c:10: error: syntax error before "passed"
685820_0_0_23199.c:19: error: `passed' undeclared (first use in this function)
685820_0_0_23199.c:20: error: `true' undeclared (first use in this function)