"Invalid conversion" error when using malloc? [duplicate]

Question

Possible Duplicate:
invalid conversion from void*' to char*' when using malloc?

I'm trying to allocate a matrix dinamically on the memmory using pointers, but I keep receiving the error messages:

|122|error: invalid conversion from 'void*' to 'int**'|

|124|error: invalid conversion from 'void*' to 'int*'|

Here is my code, I can't see what I'm doing wrong... this "void*" conversion does not make sense for me...

   int i,j;
   int **a;
   int c = 2;
 

   /* Form the matrix */
   a = malloc((nxy+1)*sizeof(int *));
   for (i=0;i<=nxy;i++)
      a[i] = malloc((nxy+1)*sizeof(int));
   
   for (i=0;i<=nxy;i++)
      for (j=0;j<=nxy;j++)
         a[i][j] = 0;
   

Answer 1

You are compiling your program with a C++ compiler. You have two choices:

1. Don't do that. Use a C compiler.
2. Cast the return value from malloc().