feat: Initial commit

2024-03-22 17:14:57 +01:00
parent dc83234df1
commit db9bafe755
45 changed files with 1996 additions and 0 deletions
--- a/2/esercizio2.c
+++ b/2/esercizio2.c
@@ -0,0 +1,110 @@
+#include <stdio.h>
+
+int comprimi(FILE *fin, FILE *fout) {
+    char lastChar = 0, currChar; // sono sicuro che il file non inizi con un null character
+    int count = 0;
+
+    int charCount = 0;
+
+    while (!feof(fin))
+    {
+        currChar = fgetc(fin);
+
+        if (feof(fin))
+            break;
+        
+
+        if (currChar != lastChar || count == 10)   {
+            if (count > 1) {
+                fputc('$', fout);
+                fputc('0'+count-1, fout);
+                charCount += 2;
+            }
+
+            count = 1;
+            lastChar = currChar;
+            fputc(currChar, fout);
+            charCount++;
+        } else {
+            count++;
+        }
+    }
+
+    if (count > 1) { // Controllo se devo scrivere le ripetizioni dell'ultimo carattere
+        fputc('$', fout);
+        fputc('0'+count-1, fout);
+        charCount += 2;
+    }
+
+    return charCount;
+}
+
+int decomprimi(FILE *fin, FILE *fout) {
+    char lastChar, currChar;
+    int count, i;
+
+    int charCount = 0;
+    while (!feof(fin))
+    {
+        currChar = fgetc(fin);
+
+        if (feof(fin))
+            break;
+
+        if (currChar == '$') {
+            count = fgetc(fin) - '0';
+
+            for (i = 0; i < count; i++)
+                fputc(lastChar, fout);
+
+            charCount += count;
+        } else {
+            lastChar = currChar;
+            fputc(currChar, fout);
+            charCount++;
+        }
+    }
+
+    return charCount;
+}
+
+
+int main()
+{
+
+    FILE *fp_read, *fp_write;
+    char operation;
+
+    puts("Inserisci 'c' per comprimere o qualsiasi altro carattere per decomprimere: ");
+    scanf(" %c", &operation);
+
+    if (operation == 'c') {
+        fp_read = fopen("./sorgente.txt", "r");
+        fp_write = fopen("./compresso.txt", "w");
+    } else {
+        fp_read = fopen("./compresso.txt", "r");
+        fp_write = fopen("./decompresso.txt", "w");
+    }
+
+    if (fp_read == NULL)
+    {
+        printf("Error opening input file\n");
+        return 1;
+    }
+    if (fp_write == NULL)
+    {
+        printf("Error opening output file\n");
+        return 2;
+    }
+
+    if (operation == 'c') {
+        comprimi(fp_read, fp_write);
+    } else {
+        decomprimi(fp_read, fp_write);
+    }
+
+    fclose(fp_read);
+    fclose(fp_write);
+
+    return 0;
+}