69. Modify Bytes in a 32-bit Value Using Union

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

typedef union{
    uint32_t value;
    uint8_t bytes[4];
}Register;

void modify_and_print(uint32_t value, uint8_t b1, uint8_t b2){
    Register reg;
    reg.value = value;
    reg.bytes[1] = b1;
    reg.bytes[2]= b2;

    printf("%u\n", reg.value);
}

int main() {
    uint32_t num;
    uint8_t b1, b2;
    scanf("%u %hhu %hhu", &num, &b1, &b2);
    modify_and_print(num, b1, b2);
    return 0;
}