View Compilation Error

0_0_4344164_1611.c:1:19: iostream: No such file or directory
0_0_4344164_1611.c:2: error: syntax error before "namespace"
0_0_4344164_1611.c:3: error: syntax error before "a"
0_0_4344164_1611.c:5: error: syntax error before '=' token
0_0_4344164_1611.c: In function `dfs':
0_0_4344164_1611.c:7: error: 'for' loop initial declaration used outside C99 mode
0_0_4344164_1611.c:9: error: `i' undeclared (first use in this function)
0_0_4344164_1611.c:9: error: (Each undeclared identifier is reported only once
0_0_4344164_1611.c:9: error: for each function it appears in.)
0_0_4344164_1611.c:11: error: `false' undeclared (first use in this function)
0_0_4344164_1611.c:14: error: `true' undeclared (first use in this function)
0_0_4344164_1611.c: In function `main':
0_0_4344164_1611.c:24: error: `true' undeclared (first use in this function)