View Compilation Error

0_0_1752540_27504.c:4: error: syntax error before "is_good"
0_0_1752540_27504.c: In function `is_good':
0_0_1752540_27504.c:10: error: `false' undeclared (first use in this function)
0_0_1752540_27504.c:10: error: (Each undeclared identifier is reported only once
0_0_1752540_27504.c:10: error: for each function it appears in.)
0_0_1752540_27504.c:19: error: `true' undeclared (first use in this function)