View Compilation Error

0_0_35427474_11231.c: In function 'main':
0_0_35427474_11231.c:7:5: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
     for (int i = 1; i <= N; i++)
     ^
0_0_35427474_11231.c:7:5: note: use option -std=c99, -std=gnu99, -std=c11 or -std=gnu11 to compile your code
0_0_35427474_11231.c:9:9: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
         for (int j = N + 1; j <= n; j++)
         ^