77. Validate Configuration Register Layout

#include <stdio.h>

typedef struct {
    unsigned short reg;
} ConfigRegister;

int validate_config(ConfigRegister *cfg) {
    int x = (cfg->reg) & 1 ;
    int y = (((cfg->reg) >> 2) & 0x3) != 3;
    int z = ((cfg->reg) >> 4) == 0 ;
    if(x && y && z) return 1;
    return 0;
}

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

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

    return 0;
}