View Compilation Error

0_0_38117426_2633.c: In function 'main':
0_0_38117426_2633.c:12:3: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
   for (int j = 1; j < i; j++) 
   ^
0_0_38117426_2633.c:12:3: note: use option -std=c99, -std=gnu99, -std=c11 or -std=gnu11 to compile your code
0_0_38117426_2633.c:14:4: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
    for (int k = 1; k <= i - j; k++) 
    ^