View Compilation Error

0_0_7630780_17252.c: In function `maketree':
0_0_7630780_17252.c:80: error: 'for' loop initial declaration used outside C99 mode
0_0_7630780_17252.c: In function `main':
0_0_7630780_17252.c:109: error: 'for' loop initial declaration used outside C99 mode