View Compilation Error

0_0_9137060_20537.c:7: error: variable-size type declared outside of any function
0_0_9137060_20537.c: In function `readint':
0_0_9137060_20537.c:22: error: 'for' loop initial declaration used outside C99 mode
0_0_9137060_20537.c: In function `check':
0_0_9137060_20537.c:32: error: 'for' loop initial declaration used outside C99 mode
0_0_9137060_20537.c: In function `main':
0_0_9137060_20537.c:49: error: 'for' loop initial declaration used outside C99 mode
0_0_9137060_20537.c:54: error: redefinition of 'i'
0_0_9137060_20537.c:49: error: previous definition of 'i' was here
0_0_9137060_20537.c:54: error: 'for' loop initial declaration used outside C99 mode