24. Data Transmission

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

#define BYTE_0SHIFT  24
#define BYTE_1SHIFT  16
#define BYTE_2SHIFT  8
#define BYTE_3SHIFT  0

#define GET_BYTE(balu, n) ((balu) >> (n) & 0xFF);

void convert_to_big_endian(uint32_t value, uint8_t arr[4]) {
    // big endian is MSB first (natural)
    //that means it will be divided into 4 and as it is goes into array
    arr[0] = GET_BYTE(value,BYTE_0SHIFT);
    arr[1] = GET_BYTE(value,BYTE_1SHIFT);
    arr[2] = GET_BYTE(value,BYTE_2SHIFT);
    arr[3] = GET_BYTE(value,BYTE_3SHIFT);

}

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;
}