Validate Configuration Register Layout

Code

#include <stdio.h>

typedef struct {
    unsigned short reg;
} ConfigRegister;

int validate_config(ConfigRegister *cfg) {
    if(((cfg->reg) & 1) != 1){
        return 0;
    }
    unsigned short bits = ((cfg->reg >> 2 ) & (0x3));
    if (bits == 3) {
        return 0;
    }
    if((((cfg->reg) >>4) & 1) != 0) {
        return 0;
    }

    return 1;
   
}

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

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

    return 0;
}

Solving Approach