View Compilation Error

0_0_21475607_2338.c: In function 'newset':
0_0_21475607_2338.c:14:2: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
  for(int i=0;i<10;i++)
  ^
0_0_21475607_2338.c:14:2: note: use option -std=c99, -std=gnu99, -std=c11 or -std=gnu11 to compile your code
0_0_21475607_2338.c: In function 'del':
0_0_21475607_2338.c:39:2: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
  for(int i=0;i<10;i++)
  ^
0_0_21475607_2338.c: In function 'main':
0_0_21475607_2338.c:55:3: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
   for(int i=0;i<n;i++)
   ^