View Compilation Error

0_0_6875706_8456.c: In function `dfs_check':
0_0_6875706_8456.c:30: error: 'for' loop initial declaration used outside C99 mode
0_0_6875706_8456.c:37: error: redefinition of 'i'
0_0_6875706_8456.c:30: error: previous definition of 'i' was here
0_0_6875706_8456.c:37: error: 'for' loop initial declaration used outside C99 mode
0_0_6875706_8456.c:41: error: redefinition of 'i'
0_0_6875706_8456.c:37: error: previous definition of 'i' was here
0_0_6875706_8456.c:41: error: redefinition of 'j'
0_0_6875706_8456.c:37: error: previous definition of 'j' was here
0_0_6875706_8456.c:41: error: 'for' loop initial declaration used outside C99 mode
0_0_6875706_8456.c:48: error: redefinition of 'i'
0_0_6875706_8456.c:41: error: previous definition of 'i' was here
0_0_6875706_8456.c:48: error: 'for' loop initial declaration used outside C99 mode