View Compilation Error

0_0_23329053_9891.c: In function 'main':
0_0_23329053_9891.c:7:2: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
  for (int i = 0; i < cases; i++)
  ^
0_0_23329053_9891.c:7:2: note: use option -std=c99, -std=gnu99, -std=c11 or -std=gnu11 to compile your code
0_0_23329053_9891.c:13:3: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
   for (int j = 1; j < n; j++)
   ^