Pack Multiple Fields into a 16-bit Control Register

Code

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

uint16_t pack_register(uint8_t mode, uint8_t speed, uint8_t status) {
    // Your logic here
    uint16_t reg;

    uint16_t moden=((mode&0x07)<<0);
    //printf("%u\n",moden);
    uint16_t speedn=((speed&0x1F)<<3);
    //printf("%u\n",speedn);
    uint16_t statusn=((status&0x3F)<<10);
    //printf("%u\n",statusn);
    reg|=(moden|speedn|statusn);

    return reg;
}

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;
}

Solving Approach

Make sure the bits is of the same number of bits as mentioned and then shift the bits accordingly and append the bits to a single reg.

Note: While shifting make sure to increase the size of the variable (eg: uint8_t to uint16_t) in order to accomadate the shifted value