77. Validate Configuration Register Layout

#include <stdio.h>

typedef struct {
    unsigned short reg;
} ConfigRegister;

int validate_config(ConfigRegister *cfg) {
    // Write logic using pointer access
    bool flag = false;
    if(cfg->reg & 0x01)
    {
        if((cfg->reg & 0x0C) != 0xC)
        {
            if((cfg->reg & 0xF0) == 0x0)
            {
                flag = true;
            }
        }
    }
    
    
    if(flag)
    {
        return 1;
    }
    else
    {
    return 0;

    }
}

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

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

    return 0;
}