View Compilation Error

0_0_28718029_25109.c: In function 'main':
0_0_28718029_25109.c:15:3: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
   for(long i=0;i<n;i++)
   ^
0_0_28718029_25109.c:15:3: note: use option -std=c99, -std=gnu99, -std=c11 or -std=gnu11 to compile your code
0_0_28718029_25109.c:22:3: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
   for(long j=0;j<=max1;j++)
   ^