77. Validate Configuration Register Layout

#include <stdio.h>

typedef struct {
    unsigned short reg;
} ConfigRegister;

int validate_config(ConfigRegister *cfg) {
    // Write logic using pointer access
    if(((cfg->reg & 1) == 1) && (((cfg->reg>>2) && 3) != 3) && 
    (((cfg->reg>>4) & 0xFFF)==0))
    {
        return 1;
    }
    else
    {
        return 0;
    }
    
}

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

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

    return 0;
}