View Compilation Error

0_0_1672105_32276.c:4: error: syntax error before "namespace"
0_0_1672105_32276.c: In function `main':
0_0_1672105_32276.c:17: error: 'for' loop initial declaration used outside C99 mode
0_0_1672105_32276.c:20: error: 'for' loop initial declaration used outside C99 mode
0_0_1672105_32276.c:28: error: 'for' loop initial declaration used outside C99 mode
0_0_1672105_32276.c:30: error: 'for' loop initial declaration used outside C99 mode
0_0_1672105_32276.c:32: error: 'for' loop initial declaration used outside C99 mode
0_0_1672105_32276.c:38: error: redefinition of 'j'
0_0_1672105_32276.c:30: error: previous definition of 'j' was here
0_0_1672105_32276.c:38: error: 'for' loop initial declaration used outside C99 mode