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 reg=cfg->reg;
    
    if((reg&1)==1)
    {
        if(((reg>>2)&3)!=3)
        {   int flag=0;
            for(int i=4;i<16;i++)
            {
                
                if(((reg>>i)&1)==0)
                continue;
                else
                {   flag=1;
                    break;
                }
            }
            if(flag==1) return 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