77. Validate Configuration Register Layout

#include <stdio.h>

typedef struct {
    unsigned short reg;
} ConfigRegister;

int validate_config(ConfigRegister *cfg) {
    // Write logic using pointer access
    int enable = (cfg->reg>>0)&1;
    int mode = (cfg->reg >>1) &(1);
   
    int priority = (cfg->reg >>2) &(3);
    int reserve  = (cfg->reg>>4)& 0xFFF;

    if((enable==1) && (priority!=3) && (reserve ==0)){
        return 1;
    }else{
        return 0;
    }
}

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

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

    return 0;
}