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file/es6_binary.cpp

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+/*
+AUTORE: Manuel Vichi 3^AIN
+Esercizio 6 File Binari
+*/
+#include <stdio.h>
+#include <stdbool.h>
+#include <stdlib.h>
+#include <time.h>
+using namespace std;
+int countBitOne(const char string[], const unsigned bit, const size_t lenght) {
+	unsigned count = 0;
+	for (size_t i = 0; i < lenght; i++) {
+		if ((string[i] >> bit) & 1) {
+			count++;
+		}
+	}
+	return count;
+}
+void generate(char string[], const size_t size) {
+	srand(time(NULL));
+	for (size_t i = 0; i < size; i++) {
+		string[i] = (rand() % 26) + 'A';
+	}
+}
+int writeBinary(const char * fileName, const char arr[], const size_t count) {
+	FILE* file = fopen(fileName,"wb");
+	if (file != NULL) {
+		int written = fwrite(arr,sizeof(char),count,file);
+		fclose(file);
+		return written;
+	} else {
+		perror("Errore durante l'apertura del file di scrittura");
+		return -1;
+	}
+	return -1;
+}
+int main(void) {
+	char fileName[] = "girmilloblu.bin";
+	char arr[10];
+	unsigned bitNumber = 3;
+	generate(arr,sizeof(arr));
+	printf("Array generato: ");
+	for (unsigned i = 0; i < sizeof(arr); i++) {
+		printf("%c", arr[i]);
+	}
+	printf("\n");
+	size_t count = sizeof(arr) / sizeof(arr[0]);
+	printf("Valori scritti nel file %s: %d\n", fileName, writeBinary(fileName,arr,count));
+	printf("Byte con il bit %d a 1: %d", bitNumber, countBitOne(arr,bitNumber,sizeof(arr)));
+	return 0;
+}