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)&&
    (((cfg->reg>>2)&(0x3))==0 || ((cfg->reg>>2)&(0x3))==0x1 || ((cfg->reg>>2)&(0x3))==0x2 )&&
    ((cfg->reg>>4)&(0xFFF))==0)
    {
        return 1;

    }
    
    
    return 0;
}

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

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

    return 0;
}