View Compilation Error

0_0_11691953_30581.c: In function `Prime':
0_0_11691953_30581.c:5: error: 'for' loop initial declaration used outside C99 mode
0_0_11691953_30581.c: In function `main':
0_0_11691953_30581.c:17: error: syntax error before '/' token
0_0_11691953_30581.c:20: error: 'for' loop initial declaration used outside C99 mode
0_0_11691953_30581.c:25: error: syntax error before '/' token
0_0_11691953_30581.c:28: error: syntax error before '/' token