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 input, uint8_t b1, uint8_t b2) {
    Register reg ; 
    reg.value = input ; 
    reg.bytes[1] = b1 ; 
    reg.bytes[2]   = b2; 
    printf("%lld" ,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;
}