View Compilation Error

0_0_8285512_18643.c: In function `add':
0_0_8285512_18643.c:9: error: 'for' loop initial declaration used outside C99 mode
0_0_8285512_18643.c: In function `main':
0_0_8285512_18643.c:25: error: 'for' loop initial declaration used outside C99 mode