View Compilation Error

159947_0_13082.c:1:17: cstdio: No such file or directory
159947_0_13082.c: In function `output':
159947_0_13082.c:11: error: syntax error before '/' token
159947_0_13082.c:13: error: syntax error before '/' token
159947_0_13082.c: In function `Cal':
159947_0_13082.c:23: error: 'for' loop initial declaration used outside C99 mode
159947_0_13082.c: In function `main':
159947_0_13082.c:43: error: syntax error before '/' token
159947_0_13082.c:45: error: 'for' loop initial declaration used outside C99 mode