77. Validate Configuration Register Layout

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

typedef struct {
        uint16_t en : 1;
        uint16_t mode : 1;
        uint16_t priority : 2;
        uint16_t reserved : 12;
    } ConfigRegister_t;

typedef union{
    uint16_t reg;
    ConfigRegister_t cfg_t;
}ConfigRegister_u;

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

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

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

    return 0;
}