Validate Configuration Register Layout

Code

#include <stdio.h>
#include <stdint.h>
typedef union {

   struct{
     uint16_t EN   : 1;
        uint16_t MODE : 1;
        uint16_t PRI  : 2;
        uint16_t  RES   : 12; // reserved
   }bits;
    unsigned short reg;
} ConfigRegister;

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

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

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

    return 0;
}

Solving Approach