View Compilation Error

1_867_3729_25547.cpp:8:1: error: expected ';' after struct definition
 }
 ^
1_867_3729_25547.cpp: In function 'int main()':
1_867_3729_25547.cpp:25:6: error: 'g' was not declared in this scope
      g[i-1].xh=i;
      ^
1_867_3729_25547.cpp:26:29: error: expected ')' before ';' token
      g[i-1].dx=1/(pow(2.0,m);
                             ^
1_867_3729_25547.cpp:28:9: error: 'g' was not declared in this scope
    sort(g,g+n,cmp);
         ^