how to use strstr()? - c++

Question

i want to take data from file and store it in string array and and perform a search function with only few information like type"j" and the program able to look for data name which contain "j".
but my program cannot work.....
i am wondering am i using the strstr() correctly or not?
my text file :
Jason Derulo
5000
Martin Delux
8752
Justin Haber
51855
Alex Zander
52163
and
coding:
#include <iostream>
#include <fstream>
#include <cstring>
using namespace std;
//---------------------------------------------------------------------------------------------------------
typedef struct
{
char name[30],adv_srh_name[30];
double balance;
}ACCOUNT;
int main()
{
ACCOUNT record[31];
int choice,acc_amount=0;
ifstream openfile("list.txt"); //open text file
if (!openfile)
{
cout << "Error opening input file\n";
return 0;
}
else
{
ACCOUNT temp;
int i = 0;
double d = 0;
while (openfile)
{
openfile.getline(temp.name, 30, '\n');
//consume the newline still in the stream:
if ((openfile >> d).get()) { temp.balance = d; }
record[i] = temp;
i++;
}
openfile.close(); //close text file
acc_amount = i;
}
cout << "Please enter a client name:";
fflush(stdin);
cin.getline(adv_srh_name, 30);
for (int j = 0; adv_srh_name[j] != NULL; j++)
adv_srh_name[j] = toupper(adv_srh_name[j]);
cout << adv_srh_name;
for (int a = 0; a < acc_amount; a++)
{
if ((strstr(record[a].name, adv_srh_name)) != NULL)
{
cout << "Name :" << record[a].name << "\n";
cout << "Balance :" << record[a].balance << "\n\n";
}
}
return 0;
}