Decode ADC Result Using Union Bitfields

Code

#include <stdio.h>
#include <stdint.h>
#include <cstdlib>
typedef union {
    struct {
        uint16_t adc_value : 12;
        uint16_t channel   : 4;
    };
    uint16_t adc_reg;
} ADC_Result;

int main() {
    uint16_t reg;
    scanf("%hx", &reg);

    // ADC_Result *adc = (ADC_Result *)malloc(sizeof(ADC_Result));
    // adc->adc_reg = reg;


    // printf("Channel: %u\n",adc->channel);
    // printf("ADC Value: %u",adc->adc_value);

    ADC_Result adc;
    adc.adc_reg = reg;


    printf("Channel: %u\n",adc.channel);
    printf("ADC Value: %u",adc.adc_value);


    // Fill union and print channel and adc_value
    return 0;
}

Solving Approach