77. Validate Configuration Register Layout

#include <stdio.h>

typedef struct {
    unsigned short reg;
} ConfigRegister;

int validate_config(ConfigRegister *cfg) {
    // Write logic using pointer access
    short int v=cfg->reg;
    //if(((cfg&1)==0)&&((cfg>>2)&3!=3)&&(cfg>>4|1==1))
    if ((v & 1) && (((v >> 2) & 3) != 3) && ((v >> 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;
}