77. Validate Configuration Register Layout

#include <stdio.h>

typedef struct {
    unsigned short reg;
} ConfigRegister;

int validate_config(ConfigRegister *cfg) {
  
    if(((*cfg).reg & 0b0000000000000001 == 1) && ((((*cfg).reg & 0b0000000000001100) >> 2)  < 3) && (((*cfg).reg & 0b1111111111110000) >> 4 == 0))
    return 1;
    else
    return 0;
}

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

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

    return 0;
}