77. Validate Configuration Register Layout

#include <stdio.h>

typedef struct {
    unsigned short reg;
} ConfigRegister;

int validate_config(ConfigRegister *cfg) {
    // Write logic using pointer access
    unsigned short value = cfg->reg; 
    int enable = (value&0x01)==1; 
    int priority = ((value>>2)&0x03)!=0x03;
    int reserved = (value&0xFFF0)==0;
    return (enable && priority && reserved);
}

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

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

    return 0;
}