24. Data Transmission

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

#define BYTE_0_MASK (0x000000FF)
#define BYTE_1_MASK (0x0000FF00)
#define BYTE_2_MASK (0x00FF0000)
#define BYTE_3_MASK (0xFF000000)

void convert_to_big_endian(uint32_t value, uint8_t arr[4]) {
    arr[3] = value & BYTE_0_MASK;
    arr[2] = (value & BYTE_1_MASK) >> 8;
    arr[1] = (value & BYTE_2_MASK) >> 16;
    arr[0] = (value & BYTE_3_MASK) >> 24;
}

int main() {
    uint32_t value;
    uint8_t arr[4];
    scanf("%u", &value);
    convert_to_big_endian(value, arr);
    for (int i = 0; i < 4; i++) {
        printf("%u", arr[i]);
        if(i<3){
            printf(" ");
        }
    }
    return 0;
}

The current solution converts a 32-bit integer to big-endian byte order by extracting each byte using bitwise masks and shifts, then storing them in a 4-element array. The most significant byte is placed at the lowest index, and the least significant byte at the highest index, matching big-endian format. This approach is efficient for preparing data for network transmission or file storage, where byte-wise representation is required. The code avoids loops for extraction, using direct assignments for each byte, resulting in clear and fast execution.