StrStrPbrk, C++ (gcc)

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//g++  7.4.0

////////////////////////////////////////////////////////////////////////////////StrStrPbrk
// 
//prototypes:
//char* strstr(char* scan,char * match);
//char* strpbrk (char *scan,char* match);
//this code is created by Rezaul Hoque on July 12,2022;
//contact:jewelmrh@yahoo.com;Dhaka,Bangladesh;https://rezaulhoque.wordpress.com,https://hoquestake.blogspot.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 <iostream>
#include <string.h>

class NamTel{

char name[25]="hoolablah";
char tel[45]="old city code ---##!\n";
public:
NamTel(){}

char* getN(){return name;}
 char* getT(){return tel;}

void disp(){ std::cout<<getN()<<"\n"<<getT();}
};
int main()
{
char * p;
char *p2;
NamTel a;
a.disp();
p=strstr(a.getT(),"old city code");

if(p!=NULL)
  strncpy(p,"new city code",13);
a.disp();
char num[7]="---##!";
p2=strpbrk(a.getT(),num);
std::cout<<"The telephone number is : ";
while (p2!=NULL)
{
std::cout<<*p2;
p2=strpbrk(p2+1,num);
}
return 0;

}

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Compilation time: 0.43 sec, absolute running time: 0.15 sec, cpu time: 0.01 sec, memory peak: 5 Mb, absolute service time: 0,63 sec