View Compilation Error

820032_0_0_28295.c:1:20: iostream: No such file or directory
820032_0_0_28295.c:2: error: syntax error before "namespace"
820032_0_0_28295.c:5: error: syntax error before "mat"
820032_0_0_28295.c:6: error: syntax error before "v"
820032_0_0_28295.c: In function `dfs':
820032_0_0_28295.c:10: error: `true' undeclared (first use in this function)
820032_0_0_28295.c:10: error: (Each undeclared identifier is reported only once
820032_0_0_28295.c:10: error: for each function it appears in.)
820032_0_0_28295.c:11: error: 'for' loop initial declaration used outside C99 mode
820032_0_0_28295.c: In function `main':
820032_0_0_28295.c:22: error: `false' undeclared (first use in this function)
820032_0_0_28295.c:27: error: `true' undeclared (first use in this function)