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| #include <iostream>
#include <cstdio>
#include <cassert>
#include <ctype.h>
//#include <windows.h>
using namespace std;
FILE * f1;
FILE * f2;
struct Forest {int weight; int root; int sim;};
struct Tree {int left, right, parent;};
struct Code{int l; char kod[600];};
void min_min (int kol, int &pos1, int &pos2);
Forest forest[300];
Tree tree[600];
Code code[300];
int k_forest = 0, k_tree = 0;
int main()
{
//очистка tree, forest, code
for (int i = 0; i < 300; i++) {forest[i].root = 0; forest[i].weight = 0; code[i].l = 0;}
for (int i = 0; i < 600; i++) {tree[i].left = 0; tree[i].right = 0; tree[i].parent = 0;}
//открытие файлов
f1 = fopen ("input.txt", "rb");
f2 = fopen ("output.txt", "wb");
fprintf (f2, "a\n");
//первое чтение, составление первичного forest`а
int a[256];
unsigned char ch;
for (int i = 0; i <= 255; i++) {a[i] = 0;}
while (fscanf(f1,"%c",&ch)!=-1)
{
a[ch]++;
}
int pos = 0;
int posa = 0;
for (int i = 0; i<=255; i++)
{
if (a[i] != 0)
{
forest[pos].weight = a[i];
pos++;
forest[posa].sim = i;
posa++;
k_forest++;
}
}
//сортировка forest`a
Forest tmp;
for (int i = 0, j; i < k_forest; i++)
{
tmp = forest[i];
for (j = i - 1; j >= 0 && forest[j].weight < tmp.weight; j--)
forest[j+1] = forest[j];
forest[j+1] = tmp;
}
for (int i = 0; i < k_forest; i++)
forest[i].root = i;
fprintf(f2, "%d\n", k_forest);
for (int i=0; i<k_forest; i++)
fprintf(f2, "%d ", forest[i].sim);
fprintf(f2, "\n");
//формирование дерева
k_forest--;
int pos1, pos2, k_tree = k_forest, k_temp = k_forest;
while (k_forest>0)
{ min_min(k_forest, pos1, pos2);
k_tree++;
tree[k_tree].left=forest[pos1].root;
tree[k_tree].right=forest[pos2].root;
tree[forest[pos1].root].parent=k_tree;
tree[forest[pos2].root].parent=k_tree;
forest[pos1].weight=forest[pos1].weight+forest[pos2].weight;
forest[pos1].root=k_tree;
forest[pos2].weight=forest[k_forest].weight;
forest[pos2].root=forest[k_forest].root;
k_forest--;
}
//собираем двоичную
//fprintf (f2, "%d", k_tree);
int r1, r2, ui=0;
for (int i=0; i<=k_temp; i++)
{
r1=i;
r2=i;
while (tree[r1].parent!=0)
{
r1=tree[r1].parent;
if (tree[r1].left==r2)
{
code[i].kod[code[i].l]=0;
code[i].l++;
}
if (tree[r1].right==r2)
{
code[i].kod[code[i].l]=1;
code[i].l++;
}
r2=r1;
}
ui++;
}
char troi;
int o=0;
for (int i=0; i<=ui;i++)
{
o=0;
int x1=code[i].l / 2;
while (o<x1)
{troi=code[i].kod[o];
code[i].kod[o]=code[i].kod[code[i].l-o-1];
code[i].kod[code[i].l-o-1]=troi;
o++;
}
}
//выводим дерево
fprintf (f2, "%d\n", k_tree);
for (int i = 0; i<=k_tree; i++)
{
fprintf (f2, "%d %d %d\n", tree[i].left, tree[i].right, tree[i].parent);
}
//Формируем текстовую часть файла
f1 = fopen ("input.txt", "rb");
unsigned char newbyte = 0;
int l_byte=0;
while (fscanf(f1, "%c", &ch)!=-1)
{
int i=0;
int p=0;
while (forest[i].sim!=ch)
{
i++;
}
while (p < code[i].l)
{ l_byte++;
newbyte=newbyte+code[i].kod[p];
if (l_byte == 8) {fprintf (f2, "%c", newbyte); newbyte=0; l_byte=0; }
newbyte= newbyte << 1;
p++;
}
}
if (l_byte!=0) {newbyte=newbyte << (7-l_byte); fprintf (f2, "%c", newbyte);}
f2 = fopen ("output.txt", "r+");
if (l_byte == 0 ) {fwrite ("0",1,1,f2);}
if (l_byte == 1 ) {fwrite ("1",1,1,f2);}
if (l_byte == 2 ) {fwrite ("2",1,1,f2);}
if (l_byte == 3 ) {fwrite ("3",1,1,f2);}
if (l_byte == 4 ) {fwrite ("4",1,1,f2);}
if (l_byte == 5 ) {fwrite ("5",1,1,f2);}
if (l_byte == 6 ) {fwrite ("6",1,1,f2);}
if (l_byte == 7 ) {fwrite ("7",1,1,f2);}
return 0;
}
//========================================================================================================================
//========================================================================================================================
void min_min (int kol_forest, int &pos1, int &pos2)
{
int min1=10000;
int min2=10001;
kol_forest++;
int i;
for (i=0; i<kol_forest; i++)
{
if (forest[i].weight < min1)
{
min2 = min1;
pos2 = pos1;
min1 = forest[i].weight;
pos1 = i;
}
else
if (forest[i].weight < min2)
{
min2 = forest[i].weight;
pos2 = i;
};
}
}; |
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