Effective C#: 2.以嵌套数组取代 多维数组[12]

          matrix[i] = new int[str2.length + 1];

   }

   matrix[0][0] = 0;

   for(i = 1; i < str2.length + 1; ++ i)

          matrix[0][i] = matrix[0][i - 1] + cost_insert;

   for(j = 1; j < str1.length + 1; ++ j)

          matrix[j][0] = matrix[j - 1][0] + cost_delete;

   for(i = 1; i < str1.length + 1; ++ i)

   {

          for(j = 1; j < str2.length + 1; ++ j) {

                 int v1, v2, v3;

                 v1 = matrix[i][j - 1] + cost_insert;

                 v2 = matrix[i - 1][j] + cost_delete;

                 if (str1[i-1] == str2[j-1]) {

                        v3 = matrix[i - 1][j - 1] + cost_match;

                 } else {