View Compilation Error

0_0_16273882_25328.cpp: In function 'int main()':
0_0_16273882_25328.cpp:11:25: error: expression in new-declarator must have integral or enumeration type
   double**a=new double*[n];  
                         ^
0_0_16273882_25328.cpp:13:20: error: expression in new-declarator must have integral or enumeration type
    a[i]=new double[m];
                    ^
0_0_16273882_25328.cpp:14:23: error: expression in new-declarator must have integral or enumeration type
   double*b=new double[m];
                       ^
0_0_16273882_25328.cpp:15:23: error: expression in new-declarator must have integral or enumeration type
   double*s=new double[n];
                       ^