24. Data Transmission

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

void convert_to_big_endian(uint32_t value, uint8_t arr[4]) {
    // Your code here
    uint32_t pre = 0x0000FF;
    uint32_t kq;
    //0x12345678 = 0001 0010 0011 0100 0101 0110 0111 1000
    for(int i =0; i <=31;i+=8){
        kq = value & (0x0000FF<<i);
         // Nếu 4 sẽ vượt mang 1 2 3 4 mà mảng từ 0 1 2 3
        arr[3 - i /8]= (kq>>i); 
    }
}

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;
}