24. Data Transmission

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

void convert_to_big_endian(uint32_t value, uint8_t arr[4]) {
    
    /*
        AA
        BB
        CC
        DD

        AA BB CC DD
    */

    assert(((1U << 8U) - 1U) == 0xFF);

    arr[0] = (value >> 24) & 0xFF; // 
    arr[1] = (value >> 16) & 0xFF;
    arr[2] = (value >> 8) & 0xFF;
    arr[3] = value & 0xFF;
}

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;
}