View Compilation Error

0_0_21200599_25174.c: In function 'ejz':
0_0_21200599_25174.c:12:9: error: expected expression before '/' token
     c--;//
         ^
0_0_21200599_25174.c: In function 'main':
0_0_21200599_25174.c:23:2: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
  for(int i=0;i<T;i++)
  ^
0_0_21200599_25174.c:23:2: note: use option -std=c99, -std=gnu99, -std=c11 or -std=gnu11 to compile your code
0_0_21200599_25174.c:27:3: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
   for(int j=1;j<=n;j++)
   ^
0_0_21200599_25174.c:31:2: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
  for(int k=0;k<T;k++)
  ^