View Compilation Error

0_0_3888423_7615.c: In function `combine':
0_0_3888423_7615.c:13: error: 'for' loop initial declaration used outside C99 mode
0_0_3888423_7615.c:14: error: 'for' loop initial declaration used outside C99 mode
0_0_3888423_7615.c: In function `main':
0_0_3888423_7615.c:27: error: 'for' loop initial declaration used outside C99 mode
0_0_3888423_7615.c:38: error: 'for' loop initial declaration used outside C99 mode