View Compilation Error

0_0_36456661_27152.cpp:11:23: error: expected identifier before ',' token
 void add1(int l,int r,,int x,int rt)
                       ^
0_0_36456661_27152.cpp: In function 'void add1(int, int, int, int, int)':
0_0_36456661_27152.cpp:18:28: error: 'p' was not declared in this scope
  if(x <= mid) add1(l,mid,x,p<<1);
                            ^
0_0_36456661_27152.cpp:19:23: error: 'p' was not declared in this scope
  else add1(mid+1,r,x,(p<<1)+1);
                       ^
0_0_36456661_27152.cpp:20:6: error: 'p' was not declared in this scope
  tre[p] = tre[p<<1]+tre[(p<<1)+1];
      ^
0_0_36456661_27152.cpp: In function 'int main()':
0_0_36456661_27152.cpp:42:21: error: too few arguments to function 'void add1(int, int, int, int, int)'
    add1(1,a[i]+1,1,n);
                     ^
0_0_36456661_27152.cpp:11:6: note: declared here
 void add1(int l,int r,,int x,int rt)
      ^