View Compilation Error

0_0_37008787_26318.c:6:1: error: unknown type name 'bool'
 bool place(int k){ 
 ^
0_0_37008787_26318.c: In function 'place':
0_0_37008787_26318.c:7:2: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
  for(int j = 1;j < k;j++){
  ^
0_0_37008787_26318.c:7:2: note: use option -std=c99, -std=gnu99, -std=c11 or -std=gnu11 to compile your code
0_0_37008787_26318.c: In function 'main':
0_0_37008787_26318.c:41:3: error: expected expression before '/' token
   //cin>>n;
   ^
0_0_37008787_26318.c:46:1: error: expected expression before '/' token
 //  cout<<sum<<endl;
 ^