Validate Configuration Register Layout

Code

#include <stdio.h>

typedef union {
    unsigned short reg;

    struct{
    
    unsigned int set : 1;
    unsigned int mode: 1;
    unsigned int vp : 2;
    unsigned int res: 12;

    };
} ConfigRegister;


int validate_config(ConfigRegister *cfg) {

    // Write logic using pointer access
     //printf("%d\n",cfg->set);
     //printf("%d\n",cfg->vp);
    

    if((cfg->set == 1) && (cfg->vp < 3) && (cfg->res == 0)){
       
        return 1;

    } 

    else return 0;
}

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

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

    return 0;
}

Solving Approach