View Compilation Error

0_0_7085790_8793.c:7: error: syntax error before '/' token
0_0_7085790_8793.c: In function `dfs':
0_0_7085790_8793.c:13: error: `flag' undeclared (first use in this function)
0_0_7085790_8793.c:13: error: (Each undeclared identifier is reported only once
0_0_7085790_8793.c:13: error: for each function it appears in.)
0_0_7085790_8793.c:22: error: 'for' loop initial declaration used outside C99 mode
0_0_7085790_8793.c: In function `main':
0_0_7085790_8793.c:54: error: syntax error before '/' token
0_0_7085790_8793.c:59: error: `flag' undeclared (first use in this function)