错误] ISO C++ 禁止指针和整数之间的比较 [-fpermissive]

Question

I'm a beginner in c++ programming and I have this activity in school. I keep getting [Error] ISO C++ forbids comparison between pointer and integer [-fpermissive] in line 15. How do you solve this? Thanks!

#include <iostream>
#include <conio.h>
#include <string.h>
using namespace std;
int pass[5];
int x;
main()
{
    cout<<"\nEnter pin code: ";
    for(x=0;x<=4;x++)
    {
        pass[x]=getch();
        putch('#');
    }   
    if(pass==86222)
        cout<<"\nW E L C O M E!";
    else
        cout<<"\nIncorrect Pin Code";
    getch();
}

Answer 1

You are doing things in a very strange way. If you wanna compare int s. Take and int , read it and compare, Why is the array needed?

The best and simple way to do this is to use only int s.

#include <iostream>
#include <conio.h>
#include <string.h>
using namespace std;
main()
{
    int pass;
    cout<<"\nEnter pin code: ";
    cin>>pass;

    if(pass==86222)
        cout<<"\nW E L C O M E!";
    else
        cout<<"\nIncorrect Pin Code";
    getch();
}

---

If you want to do it the way you want, then use strcmp()

#include <iostream>
#include <conio.h>
#include <string.h>
using namespace std;
char pass[5];
int x;
main()
{
    cout<<"\nEnter pin code: ";
    for(x=0;x<=4;x++)
    {
        pass[x]=getch();
        putch('#');
    }   
    if(!strcmp(pass, "86222"))
        cout<<"\nW E L C O M E!";
    else
        cout<<"\nIncorrect Pin Code";
    getch();
}

Answer 2

You are reading characters and comparing them as ints. That won't work....

The following first places the charactes into an array of characters, then converts that aray to an int and compares the int:

char passch[6];
int pass, x;
main()
{
    cout<<"\nEnter pin code: ";
    for(x=0;x<=4;x++)
    {
        passch[x]=getch();
        putch('#');
    } 
    passch[5]= '\0';
    pass= atoi(passch);
    if(pass==86222)
        cout<<"\nW E L C O M E!";
    else
        cout<<"\nIncorrect Pin Code";
    getch();
}

Answer 3

pass is an array (which is implemented in c++ as a pointer) and 86222 is an integer. you cannot compare those.

As @haris said in their comment, you really just want to store the input as an integer. you do this with std::cin >> pass . then you can compare pass with your stored value.