How to Store Randomly Generated String and Compare them

[gvim80]

Hello, How do I store a randomly generated string and Compare them

  #include "main.h" //all the includes
using namespace std;

//generate strings and numbers
char alphanumeric(int x){
    if(x < 10)
        return char(x+48);
    if(x < 36)
        return char(x+55);
    if(x < 62)
        return char(x+61);
    return '?';
}

int main()
{
    //seed every run
    srand(time(0));
    srand(rand());
    //
    for(int x = 0; x < 7; ++x){
        for(int i = 0; i < 5; ++i)
            cout << alphanumeric(rand()%62);
            cout<<endl;
    }
    return 0;
}

[dutch]

Your question is unclear.

#include <iostream>
#include <cstdlib>
#include <ctime>
using namespace std;

char rnd_alnum(int x) {
    if (x <  0) return '?';
    if (x < 10) return x      + '0';
    if (x < 36) return x - 10 + 'A';
    if (x < 62) return x - 36 + 'a';
    return '?';
}

int main() {
    srand(time(0));
    for(int row = 0; row < 7; ++row) {
        for(int col = 0; col < 15; ++col)
            cout << rnd_alnum(rand() % 62) << ' ';
        cout << '\n';
    }
}

r 6 M e V A Y 0 S g W Q f r M 
S Q 3 e U K e u Q N L 6 z P U 
A E Y W r 3 h P 3 7 3 Y Y i P 
s 8 q t m I D Q B b m W f l t 
7 t 8 f Q x i 5 M k C P I i 5 
h Y D V R x m d M x C 8 R s r 
K x l Q d B N J E h 1 Q 4 J 7 

[AbstractionAnon]

How do I store a randomly generated string and Compare them

When you say "a randomly generated string", you're referring to a singular string.
When you say "compare", you implying at two strings.

Perhaps something like this:

#include <cstdlib>
#include <iostream>
#include <string>
#include <ctime>
using namespace std;

//generate strings and numbers
char alphanumeric(int x) {
    if (x < 10)
        return char(x + 48);
    if (x < 36)
        return char(x + 55);
    if (x < 62)
        return char(x + 61);
    return '?';
}

int main()
{   std::string a;
    std::string b;
    char c;

    //seed every run
    srand(time(0));
 
    //
    for (int x = 0; x < 7; ++x) 
        {   a += alphanumeric(rand() % 62);
            b += alphanumeric(rand() % 62);
        }
        if (a == b)
            cout << "strings are equal" << endl;    
    return 0;
}

[dutch]

He also mentions "storing" the strings. So perhaps something like this:

#include <iostream>
#include <string>
#include <vector>
#include <random>
using namespace std;

const int NumStrings   = 10;
const int StringLength = 15;

char rnd_alnum() {
    static default_random_engine rnd(random_device{}());
    static uniform_int_distribution<> dist(0, 61);
    int x = dist(rnd);
    if (x < 10) return x + '0';
    if (x < 36) return x - 10 + 'A';
    return x - 36 + 'a';
}

int main() {
    vector<string> strs;

    for(int i = 0; i < NumStrings; ++i) {
        string str;
        for(int j = 0; j < StringLength; ++j)
            str += rnd_alnum();
        strs.push_back(str);
    }

    for (const auto& str: strs)
        cout << str << '\n';
}

As for "comparing" the strings, that could mean a few things. Maybe he wants to know how many characters they have in common ... who knows?

[gvim80]

Hey, thanks for the replies but fortunately I've already figured it out.

#include "main.h" //all the includes
using namespace std;

//generate strings and numbers
char alphanumeric(int x){
    if(x < 10)
        return char(x+48);
    if(x < 36)
        return char(x+55);
    if(x < 62)
        return char(x+61);
    return '?';
}
int main()
{
    //seed every run
    srand(time(0));
    srand(rand());
    //
    int x,i;
   	int account;
    string pass;
    string passholder[11];
    for(x = 0; x < 11; ++x){
        for(i = 0; i < 10; ++i){
            pass = alphanumeric(rand()%62);
            passholder[x] += pass;
        }
    cout << x << "--------" << passholder[x]<<endl;
	passholder[x] += '\0'; //prevent concatation
	}
    cout << "Element [0] has " << passholder[0] << endl;
    cout << "Choose an Account ";
    cin >> account;
	
	if(account > 11){
		cout << "Account Not found";
	}
	else {
		cout << "Account Found!";
	}
	    
    return 0;
}

0--------hz4GFdiMyr
1--------9o2DQ1T9zY
2--------axBDiliEjv
3--------VyS41tnzfn
4--------qjDIcpYFC5
5--------OnsXvCntkk
6--------YJjuRsBA47
7--------CY8CqAN4gq
8--------q4ri1AKERJ
9--------yG3Nfdvfv7
10--------BRmkWP9eG2
Element [0] has hz4GFdiMyr