Write a C program to verify the String 0(0|1)*1

#include<stdio.h>

#include<conio.h>

#include<string.h>

void main()

{

          char str[20];

          int i,len;

          clrscr();

          printf("\n Enter the String:-");

          gets(str);

          len=strlen(str)-1;

          if((str[0]=='0' && str[len]=='1'))

                   printf("\n Validddd.....");

          else

                   printf("\n INValid String");

  getch();

}