View Compilation Error

0_0_16247815_27366.c: In function 'main':
0_0_16247815_27366.c:17:3: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
   for (int i = 0; i < n; i++)
   ^
0_0_16247815_27366.c:17:3: note: use option -std=c99, -std=gnu99, -std=c11 or -std=gnu11 to compile your code
0_0_16247815_27366.c:31:26: error: expected expression before '/' token
    h = h + atoi(B); k++; //printf("%d\n", h);
                          ^
0_0_16247815_27366.c:37:26: error: expected expression before '/' token
    m = m + atoi(D); k++; //printf("%d*\n", m);
                          ^
0_0_16247815_27366.c:43:21: error: expected expression before '/' token
    s = s + atoi(E); //printf("%d**\n", s);
                     ^