View Compilation Error

0_0_10094709_2599.c: In function `cmp':
0_0_10094709_2599.c:17: error: `road' undeclared (first use in this function)
0_0_10094709_2599.c:17: error: (Each undeclared identifier is reported only once
0_0_10094709_2599.c:17: error: for each function it appears in.)
0_0_10094709_2599.c:17: error: `x' undeclared (first use in this function)
0_0_10094709_2599.c:17: error: syntax error before ')' token
0_0_10094709_2599.c:18: error: `y' undeclared (first use in this function)
0_0_10094709_2599.c:18: error: syntax error before ')' token
0_0_10094709_2599.c: In function `kruskal':
0_0_10094709_2599.c:29: error: 'for' loop initial declaration used outside C99 mode
0_0_10094709_2599.c: In function `main':
0_0_10094709_2599.c:54: error: 'for' loop initial declaration used outside C99 mode
0_0_10094709_2599.c:64: error: syntax error before '/' token