View Compilation Error

0_0_14566485_6509.c:37:1: error: unknown type name 'bool'
 bool kruskal()
 ^
0_0_14566485_6509.c: In function 'kruskal':
0_0_14566485_6509.c:47:35: error: 'true' undeclared (first use in this function)
             if(1 == count) return true;
                                   ^
0_0_14566485_6509.c:47:35: note: each undeclared identifier is reported only once for each function it appears in