View Compilation Error

0_0_38138333_9236.c: In function 'panduan':
0_0_38138333_9236.c:12:2: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
  for(int j = 2;j<=sqrt(i);j++)
  ^
0_0_38138333_9236.c:12:2: note: use option -std=c99, -std=gnu99, -std=c11 or -std=gnu11 to compile your code