Validate Configuration Register Layout

Code

#include <stdio.h>

typedef struct {
    unsigned short reg;
} ConfigRegister;

int validate_config(ConfigRegister *cfg) {
    // Write logic using pointer access
    int ena = (cfg->reg) & 1;
    int prio = (((cfg->reg) & 0x0C)>>2);
    int res = (((cfg->reg) & 0xFFF0)>>4);

    if (ena == 1 && prio!=3 && res == 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