71. Decode ADC Result Using Union Bitfields

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

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 a;
    a.adc_reg = reg;
    printf("Channel: %d\nADC Value: %d\n", a.channel, a.adc_value);
    return 0;
}