View Compilation Error

0_0_28200836_16340.c: In function 'main':
0_0_28200836_16340.c:20:3: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
   for (int i = 0; i< n ; i++)
   ^
0_0_28200836_16340.c:20:3: note: use option -std=c99, -std=gnu99, -std=c11 or -std=gnu11 to compile your code