View Compilation Error

85399_0_18882.c: In function `isPrime':
85399_0_18882.c:10: error: 'for' loop initial declaration used outside C99 mode
85399_0_18882.c: In function `main':
85399_0_18882.c:23: error: 'for' loop initial declaration used outside C99 mode
85399_0_18882.c:24: error: conflicting types for 'i'
85399_0_18882.c:23: error: previous definition of 'i' was here
85399_0_18882.c:24: error: 'for' loop initial declaration used outside C99 mode
85399_0_18882.c:26: error: conflicting types for 'i'
85399_0_18882.c:24: error: previous definition of 'i' was here
85399_0_18882.c:26: error: 'for' loop initial declaration used outside C99 mode