View Compilation Error

0_0_3910167_29644.c: In function `bfs':
0_0_3910167_29644.c:14: error: 'for' loop initial declaration used outside C99 mode
0_0_3910167_29644.c: In function `main':
0_0_3910167_29644.c:24: error: 'for' loop initial declaration used outside C99 mode
0_0_3910167_29644.c:26: error: redefinition of 'i'
0_0_3910167_29644.c:24: error: previous definition of 'i' was here
0_0_3910167_29644.c:26: error: 'for' loop initial declaration used outside C99 mode
0_0_3910167_29644.c:27: error: 'for' loop initial declaration used outside C99 mode