View Compilation Error

0_0_3102107_27552.c: In function `encode':
0_0_3102107_27552.c:7: error: 'for' loop initial declaration used outside C99 mode
0_0_3102107_27552.c: In function `decode':
0_0_3102107_27552.c:21: error: 'for' loop initial declaration used outside C99 mode
0_0_3102107_27552.c: In function `main':
0_0_3102107_27552.c:95: error: 'for' loop initial declaration used outside C99 mode