gistfile1.txt

#include <stdio.h>
#include <stdint.h>

void intToByteArray(int *array, unsigned long int number) {
    for (int i = 0; i < 5; i++) {
        array[i] = (number >> (8 * i)) & 0xFF;
    }
}

long int byteArrayToInt(int *array) {
    int number = 0;
    for (int i = 0; i < 5; i++) {
        number |= (int)array[i] << (8 * i);
    }
    return number;
}

int main() {
   unsigned long int number = 98765455;
    int byteArray[5];

    // Convert integer to byte array
    intToByteArray(byteArray, number);

    // Print byte array
    printf("Byte Array: ");
    for (int i = 0; i < 5; i++) {
        printf("%02X ", byteArray[i]);
    }
    printf("\n");

    // Convert byte array back to integer
   unsigned long int restoredNumber = byteArrayToInt(byteArray);

    // Print restored integer
    printf("Restored Number: %i\n", restoredNumber);

    return 0;
}



////////////////////******************* Versopn 2 64 bit variable
#include <stdio.h>
#include <stdint.h>

void intToByteArray(uint8_t *array, uint64_t number) {
    for (int i = 0; i < 5; i++) {
        array[i] = (number >> (8 * i)) & 0xFF;
    }
}

uint64_t byteArrayToInt(uint8_t *array) {
    uint64_t number = 0;
    for (int i = 0; i < 5; i++) {
        number |= (uint64_t)array[i] << (8 * i);
    }
    return number;
}

int main() {
    uint64_t number = 98;
    uint8_t byteArray[5];

    // Convert integer to byte array
    intToByteArray(byteArray, number);

    // Print byte array
    printf("Byte Array: ");
    for (int i = 0; i < 5; i++) {
        printf("%02X ", byteArray[i]);
    }
    printf("\n");

    // Convert byte array back to integer
    uint64_t restoredNumber = byteArrayToInt(byteArray);

    // Print restored integer
    printf("Restored Number: %llu\n", restoredNumber);

    return 0;
}
///////////////////////// text to array and back to text
#include <stdio.h>
#include <string.h>
#include <stdint.h>

void stringToByteArray(const char *str, uint8_t *array) {
    int length = strlen(str);
    for (int i = 0; i < length; i++) {
        array[i] = (uint8_t)str[i];
    }
}

void byteArrayToString(const uint8_t *array, char *str, int length) {
    for (int i = 0; i < length; i++) {
        str[i] = (char)array[i];
    }
    str[length] = '\0'; // Null-terminate the string
}

int main() {
    const char *inputString = "this I need to save ";
    uint8_t byteArray[strlen(inputString)]; // Use length of inputString as size
    char outputString[strlen(inputString) + 1]; // Extra space for null terminator

    // Convert string to byte array
    stringToByteArray(inputString, byteArray);

    // Print byte array
    printf("Byte Array: ");
    for (int i = 0; i < strlen(inputString); i++) {
        printf("%02X ", byteArray[i]);
    }
    printf("\n");

    // Convert byte array back to string
    byteArrayToString(byteArray, outputString, strlen(inputString));

    // Print restored string
    printf("Restored String: %s\n", outputString);

    return 0;
}