View Compilation Error

0_0_11577301_28859.c: In function `add':
0_0_11577301_28859.c:9: error: 'for' loop initial declaration used outside C99 mode
0_0_11577301_28859.c: In function `change':
0_0_11577301_28859.c:28: error: 'for' loop initial declaration used outside C99 mode
0_0_11577301_28859.c: In function `main':
0_0_11577301_28859.c:36: error: 'for' loop initial declaration used outside C99 mode
0_0_11577301_28859.c:49: error: redefinition of 'i'
0_0_11577301_28859.c:36: error: previous definition of 'i' was here
0_0_11577301_28859.c:56: error: syntax error before '/' token
0_0_11577301_28859.c:60: error: syntax error before '/' token
0_0_11577301_28859.c:68: error: syntax error before '/' token
0_0_11577301_28859.c:81: error: syntax error before '/' token