Errors about array

[wingster]

I am trying to run a C source code about Evolutionary Programming.
I get these errors after the compilation.
Anyone can help me to fix it? I am using VC 2005
I need help urgently.


Here is the error part:--

double function14(int n)
{
  double value;
  int i,j;

  double sum1,sum2,prod;

  double a[n][25];

  for(j=0;j<25;j=j+5)
  {
    a[0][j]=-32.0;
    a[0][j+1]=-16.0;
    a[0][j+2]=0.0;
    a[0][j+3]=16.0;
    a[0][j+4]=32.0;
 } 

error C2057: expected constant expression
error C2466: cannot allocate an array of constant size 0
error C2133: 'a' : unknown size


Thanks everyone

[helios]

Line 8: You cannot use a variable to declare an array.