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 temp = cfg -> reg;
    if(!(temp & (1<<0))) return 0;
    if(!((temp & (11<<2)) != 11)) return 0;
    for(int i = 4;i<16;i++){
        if((temp & (1 << i)) ) return 0;
    }
    return 1;
}

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

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

    return 0;
}