77. Validate Configuration Register Layout

#include <stdio.h>

typedef struct {
    unsigned short reg;
} ConfigRegister;

int validate_config(ConfigRegister *cfg) {
    // Write logic using pointer access
    int reg_16 = cfg->reg;
    if((reg_16 & 0x01) == 1 && ((reg_16>>2) & 0x11) < 3 && ((reg_16>>4) & 0x111111111111) == 0  )
    {
        return 1;
    }
    return 0;
}

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

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

    return 0;
}