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)& 0x1)!=1){
        return 0;
    }
    if ((((cfg->reg)& 0x9)>>2)==0x3){
        return 0;
    }
    if (((cfg->reg)>>4)!=0){
        return 0;
}else{
    return 1;
}
}

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

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

    return 0;
}