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how 2 change thread title?

#include <iostream>
#include <iomanip>
#include <conio.h>
#include <math.h>
#include <string>
#include <ctype.h>
#include <fstream>

using namespace std;
void password_generator();

char name[]="abcdefghijklmnopqrstuvwxyz0123456789";
char password[6];
srand (time(NULL));
for (int i=0;i<6;i++)
{password[i]=name[rand()%37];
}
cout<<"Your...

the output become invalid name entry invalid name entry valid no matter wat i typed... wat is code tags?

cout<<"Please enter your name:";
cin>>user.name;
int i=0;
char name[i];
while (name[i])
{
if (isalpha(name[i])) cout<<"Valid",name[i];
else cout<< "Invalid name...

can i know how to want the user to insert only words without numbers and vice verse?
i want limit it to insert either words or numbers or else ask the user to reenter the value

cout<<"Please...

can i know how to want the user to insert only words without numbers and vice verse?

erm, i actually creating a program that want user detail to generate password

char *name,*nickname,*hobby;
cout<<"Please enter your name:";
cin>>name;
cout<<"Please enter your nick name:";
cin>>nickname;
cout<<"Please enter your hobby:";
cin>>hobby;

anything wrong...