77. Validate Configuration Register Layout

#include <stdio.h>

typedef struct {
    unsigned short reg;
} ConfigRegister;

int validate_config(ConfigRegister *cfg) {
    // Write logic using pointer access
    int a=0,b=0,d=0;
    char c;
    if ((cfg->reg & (1<<0))!=0)  a=1;
    c=(((cfg->reg)>>2)&(0x03));
    if(c<3) b=1;
    if(((cfg->reg)&(0xfff0))==0) d=1;
    if(a&b&d) return 1;
    else return 0;
    
}

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

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

    return 0;
}