Reminder, C++ (gcc)

Language: Layout:

//g++  7.4.0
//Reminder: a reminder to book club member; use of istringstream and istringstream;
//this code is created by Rezaul Hoque on October 27,2021;contact: jewelmrh@yahoo.com
//note: codes shared by Rezaul Hoque on rextester are not for sale; they are created and shared to facilitate the algorithm learning process; many like Hoque use this platform to practice programming ;Rezaul hopes his contribution helps others to fine tune their learning;

#include <sstream>
#include <string>
#include <iostream>

void remind(std::string);
void remind(std::string sval)
{
std::istringstream ist;
std::ostringstream ost;
ist.str(sval);
std::string s,s2,s3;
int m,m2,due;
ist>>s>>m>>m2>>s2>>s3>>due;
ost<<"Dear ";
if (m) ost<<"Mr ";
else {
if(m2)
           ost<<"Miss ";
else
           ost<<" Mrs ";
 }
ost<<s<<",\nfrom "<<s2<<" "<<s3<<", we are updating our catalogue.";

if(due) ost<<"Please clear your dues and pay update charge of Tk 100 by December.\n\n";
else 
         ost<<"Please pay update charge of Tk 100 by December.\n\n";
std::string display=ost.str();
std::cout<<display;

}

int main()
{
remind("AAA 1 1 East City 1");
remind("BBB 1 0 West City 0");
remind( "ZZZ 0 1 North City 1");
remind("CCC 0 0 South City 0");
return 0;
}

Show compiler warnings [ + ] Compiler args [ + ] Show input
Compilation time: 0.42 sec, absolute running time: 0.15 sec, cpu time: 0.01 sec, memory peak: 5 Mb, absolute service time: 0,69 sec