View Compilation Error

0_0_8984085_19388.c:3: error: syntax error before "namespace"
0_0_8984085_19388.c:9: error: syntax error before "insert"
0_0_8984085_19388.c: In function `dfs':
0_0_8984085_19388.c:21: error: 'for' loop initial declaration used outside C99 mode
0_0_8984085_19388.c: In function `main':
0_0_8984085_19388.c:42: error: too many arguments to function `getchar'
0_0_8984085_19388.c:43: error: 'for' loop initial declaration used outside C99 mode
0_0_8984085_19388.c:45: error: 'for' loop initial declaration used outside C99 mode
0_0_8984085_19388.c:50: error: too many arguments to function `getchar'