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file/es7_binary.cpp

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+/*
+AUTORE: Manuel Vichi 3^AIN
+Esercizio 7 File Binari
+*/
+#include <stdio.h>
+#include <stdbool.h>
+#include <stdint.h>
+using namespace std;
+void fChangeEndianness(char * fileName) {
+	FILE *file = fopen(fileName, "rb+");
+    if (!file) {
+        perror("Errore durante l'apertura del file di lettura/scrittura");
+        return;
+    }
+    uint8_t buffer[4];
+    long pos = 0;
+    while (fread(buffer, 1, 4, file) == 4) {
+        uint8_t tmp;
+        tmp = buffer[0]; buffer[0] = buffer[3]; buffer[3] = tmp;
+        tmp = buffer[1]; buffer[1] = buffer[2]; buffer[2] = tmp;
+        fseek(file, pos, SEEK_SET);
+        fwrite(buffer, 1, 4, file);
+        pos += 4;
+        fseek(file, pos, SEEK_SET);
+    }
+    fclose(file);
+}
+int main(void) {
+	char file[] = "indiano.bin";
+	fChangeEndianness(file);
+	return 0;
+}