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 enable = cfg->reg & 1;
    int priority = (cfg->reg >> 2 ) & 3;
    int reserved = (cfg->reg >> 4 ) & 0x0FFF;
    if(enable == 1 && priority !=3 && reserved==0 ){
    return 1;
    }
    return 0;
}

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

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

    return 0;
}