Make this C$++$program to run multiple time.

#include

#include

#include

$//$ Function to convert hexadecimal string to decimal integer

unsigned int hexToDec$($const std::string& hexStr$)\{$

unsigned int result;

std::stringstream ss;

ss $<<$ std::hex $<<$ hexStr;

ss $>>$ result;

return result;

$\}$

$//$ Function to convert hexadecimal IP address to decimal IP address

std::string hexIPToDec$($const std::string& hexIP$)\{$

std::string decIP;

for $($size$\_$t i $=0$; i $<$ hexIP.size$()$; i $+=2)\{$

std::string byteStr $=$ hexIP.substr$($i$,2)$;

unsigned int byte $=$ hexToDec$($byteStr$)$;

decIP $+=$ std::to$\_$string$($byte$)$;

if $($i $<$ hexIP.size$()-2)\{$

decIP $+="."$;

$\}$

$\}$

return decIP;

$\}$

int main$()\{$

std::cout $<<$ "Enter the hexadecimal IP datagram header: $"$;

std::string header;

std::cin $>>$ header;

$//$ Validate input length

if $($header$.$length$()!=20)\{$

std::cout $<<$ "Error: Illegal header size" $<<$ std::endl;

return $1$;

$\}$

$//$ Extract information

unsigned int version $=$ hexToDec$($header$.$substr$(0,1))$;

if $($version $!=4$ && version $!=6)\{$

std::cout $<<$ "Error: Wrong version $($should be $4$ or $6)"<<$ std::endl;

return $1$;

$\}$

unsigned int headerLength $=$ hexToDec$($header$.$substr$(1,1))*4$;

unsigned int totalLength $=$ hexToDec$($header$.$substr$(2,4))$;

unsigned int dataSize $=$ totalLength $-$ headerLength;

unsigned int protocol $=$ hexToDec$($header$.$substr$(10,2))$;

std::string sourceIP $=$ hexIPToDec$($header$.$substr$(12,8))$;

std::string destIP $=$ hexIPToDec$($header$.$substr$(20,8))$;

$//$ Display information

std::cout $<<$ "Version: $"<<$ version $<<$ std::endl;

std::cout $<<$ "Header Length: $"<<$ headerLength $<<$ std::endl;

std::cout $<<$ "Total Length: $"<<$ totalLength $<<$ std::endl;

std::cout $<<$ "Size of Data: $"<<$ dataSize $<<$ std::endl;

std::cout $<<$ "Protocol: $"<<$ protocol $<<$ std::endl;

std::cout $<<$ "Source IP address: $"<<$ sourceIP $<<$ std::endl;

std::cout $<<$ "Destination IP address: $"<<$ destIP $<<$ std::endl;

return $0$;

$\}$