| 摘要 |
A computer-readable recording medium stores therein an information processing program that causes a computer to execute storing an aggregate of layers of nodes respectively having a pointer to an upper node, pointers to a leaf and/or a lower node and branches to lower nodes; obtaining a totaling result of appearance frequencies of character codes described in a file; classifying the character codes by layer, based on appearance probabilities thereof and the totaling result; calculating, based on a quantity of character codes in an ith layer and for the ith layer, a quantity of pointers pointing to leaves, and based on the quantity calculated and for the ith layer, further calculating a number of times nodes are used and a quantity of pointers pointing to lower nodes; generating, based on calculation results, a Huffman tree; and converting the Huffman tree into a node-less Huffman tree and storing the node-less Huffman tree.
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