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 en = cfg->reg&0x0001;
    int mode = ((cfg->reg)>>1)&0x0001;
    int priority= ((((cfg->reg)>>2)&0x0003)==3)?0:1;
    //int res=((cfg->reg)>>4)&0xffff;
    if((en&&priority) && (((cfg->reg)>>4)==0)){
        return 1;
    }

    return 0;
}

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

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

    return 0;
}