CareerCup

String ip = "244.21.233.11";
		String[] bits = ip.split("\\.");
		int ip_addr = 0;
		for (String bit : bits) {
			ip_addr = ip_addr << 8 | Integer.parseInt(bit);
		}
		System.out.println(Integer.toBinaryString(ip_addr));

i think here they are asking to parse from left to right and not to use some std methods...

#include <stdio.h>
#include <string.h>

int main ()
{
char str[] ="198.160.9.10";
char * pch;
printf ("Splitting string \"%s\" into tokens:\n",str);
pch = strtok (str,".");
while (pch != NULL)
{
printf ("%s\n",pch);
int l=strlen(pch);
int i=0,num=0;
while(i<l){
num*=10;
num+=pch[i++]-'0';
}
pch = strtok (NULL, ".");
printf("\nint value is :%d\n",num);
}
return 0;
}

Please comment!!

why this ?

pch = strtok (NULL, ".");

<pre lang="c" line="1" title="CodeMonkey1286" class="run-this"> void TokenizeIpAddressToIntegers(char* address)
{
int begin = 0, end = 0;

while(address[end])
{
if(address[end] == '.')
{
PrintInt(address, begin, end);
end++;
begin = end;
}
else
{
end++;
}
}

PrintInt(address, begin, end);
}

void PrintInt(char *address, int begin, int end)
{
int num = 0;
int length = end - begin;

while(length > 0)
{
int digit = address[begin] - 48;
num = num + digit * pow(10.0, (length-1));
length--;
begin++;
}

printf("%d\n", num);
}

int main()
{
char *address = "192.168.20.002";
TokenizeIpAddressToIntegers(address);
}</pre>

<pre lang="c" line="1" title="CodeMonkey24878" class="run-this"> void TokenizeIpAddressToIntegers(char* address)
{
int begin = 0, end = 0;

while(address[end])
{
if(address[end] == '.')
{
PrintInt(address, begin, end);
end++;
begin = end;
}
else
{
end++;
}
}

PrintInt(address, begin, end);
}

void PrintInt(char *address, int begin, int end)
{
int num = 0;
int length = end - begin;

while(length > 0)
{
int digit = address[begin] - 48;
num = num + digit * pow(10.0, (length-1));
length--;
begin++;
}

printf("%d\n", num);
}

int main()
{
char *address = "192.168.20.002";
TokenizeIpAddressToIntegers(address);
}</pre>