How to read text file into matrix

See more:

C

Assume the text file contains data as below:
A;B;2
A;C;4
B;C;5

I would like to convert it to multi-dimensional matrix in the form of matrix[i][j].I'm thinking of allocate array of pointers to arrays.
The problem now is how to convert the form as in the text file into matrix[i][j].
The row and column will change according to the data size.

The output that I'm looking for is something like this:

         0  1  2 (columns)
      0  1  2  4
(rows)1  2  1  5
      2  4  5  1

Note: if(i=j) matrix[i][j]=1
symmetrical: matrix[i][j] = matrix [j][i]