77. Validate Configuration Register Layout

#include <stdio.h>

typedef struct {
    unsigned short enable   : 1;
    unsigned short mode     : 1;
    unsigned short priority : 2;
    unsigned short reserved : 12;
} Sensor;

typedef union {
    unsigned short reg;
    Sensor bits;
} ConfigRegister;

int validate_config(ConfigRegister *cfg) {
    // Write logic using pointer access
    if (cfg->bits.enable == 1 && cfg->bits.priority != 3 && cfg->bits.reserved == 0) {
        return 1;
    }
    return 0;
}

int main() {
    ConfigRegister cfg;
    scanf("%hx", &cfg.reg);

    int result = validate_config(&cfg);
    printf("%d", result);

    return 0;
}