0_0_33884757_11483.c: In function 'sort':
0_0_33884757_11483.c:10:3: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
for (int j = 0; j < len - 1 - i; j++) {
^
0_0_33884757_11483.c:10:3: note: use option -std=c99, -std=gnu99, -std=c11 or -std=gnu11 to compile your code
0_0_33884757_11483.c: In function 'print':
0_0_33884757_11483.c:22:2: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
for (int i = 0; i < len; i++) {
^
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