25. Pack Multiple Fields into a 16-bit Control Register

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

uint16_t pack_register(uint8_t mode, uint8_t speed, uint8_t status) {
    // Your logic here
    uint16_t out=0;
    out &=~(0x07<<0);
    out|= ((mode&0x07)<<0);
    out &=~(0x1F<<3);
    out|= ((speed&0x1F)<<3); 
    out &=~(0x3F<<10);
    out|= ((status&0x3F)<<10);
    out&=~(0x03<<8);
    return out;
}

int main() {
    uint8_t mode, speed, status;
    scanf("%hhu %hhu %hhu", &mode, &speed, &status);

    uint16_t reg = pack_register(mode, speed, status);
    printf("%u", reg);
    return 0;
}