Validate Configuration Register Layout

Code

#include <stdio.h>

typedef struct {
    unsigned short reg;
} ConfigRegister;

int validate_config(ConfigRegister *cfg) {
    // Write logic using pointer access
    unsigned short val = cfg->reg;

    if (((val & 1) == 1) &&
        (((val >> 2) & 3) < 3) &&
        ((val >> 4) == 0)) {
            return 1;
        }
    return 0;
    
}

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

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

    return 0;
}

Solving Approach