View Compilation Error

0_0_33797923_32407.c:2:1: error: unknown type name 'bool'
 bool mark[100005];
 ^
0_0_33797923_32407.c: In function 'pre':
0_0_33797923_32407.c:7:2: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
  for (int i = 2; i <= 100000; i++)
  ^
0_0_33797923_32407.c:7:2: note: use option -std=c99, -std=gnu99, -std=c11 or -std=gnu11 to compile your code
0_0_33797923_32407.c:11:3: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
   for (int j = 1; j <= ptot && i * prime[j] <= 100000; j++)
   ^
0_0_33797923_32407.c: In function 'main':
0_0_33797923_32407.c:27:3: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
   for (int i = 1; i <= ptot; i++)
   ^
0_0_33797923_32407.c:28:4: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
    for (int j = i; j <= ptot; j++)
    ^