Question

I need help with coding with c++. I need to make a lottery program where you enter in 5 numbers from 0-9 and the program will generate 5 random numbers 0-9 to represent the lottery numbers. I'm almost done, but the output isn't exactly what I want. It works fine, but the format should look like this:

lottery array: 7 4 9 1 3
user array: 4 2 9 7

p.s. I also need to count how many matching numbers there are from the user input and the lottery and need help with that as well, because it says match is uninitialized for some reason.

I have been trying to get it done, but i am stuck. Here's my code:

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

void input(int user[], int raysize);
void rand(int lot[], int raysize);
void print(int lot[], int user[]);
int compare(int lot[], int user[]);
void matches(int match);

int main()
{
  
   const int raysize = 5;
   int user[5], lot[5];
   int match;
   srand(time(0));
   input(user, raysize);
   rand(lot, raysize);
   print(lot, user);
   compare(lot, user);
   matches(match);
   system("PAUSE");
}

void input(int user[], int raysize)
{
   for (int i = 0;i < 5;i++)
   {
       cout << "Enter in five numbers from 0-9" << endl;
       cin >> user[i];
   }
   int i = 0;
   while (user[i] < 0 || user[i]>9)
   {
       cout << "Error!" << endl;
       exit(1);
   }
}

void rand(int lot[], int raysize)
{
   for (int i = 0; i < 5; i++)
   {
       lot[i] = rand() % 10;
   }

}

void print(int lot[], int user[])
{
   for (int i = 0; i < 5; i++)
   {
      
       cout << "Lottery numbers are: "<< lot[i]<< " " << " your numbers are: " << user[i] << endl;
      

   }
  
}

int compare(int lot[], int user[])
{
   int match = 0;
   for (int i = 0;i < 5;++i)
   {
       if (user[i] == lot[i])
       {
           match++;
       }
   }
   return match;

  
}

void matches(int match)
{
  
}

If possible can you try to do this question similar to this structure? It will help more that way.

Answer 1

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

void input(int user[], int raysize);
void rand(int lot[], int raysize);
void print(int lot[], int user[]);
int compare(int lot[], int user[]);

/*EDITED*/
//i have changed the protoype of this function. I have passed two arrays into it
void matches(int match,int[],int[]);

int main()
{
  
const int raysize = 5;
int user[5], lot[5];
int match;
srand(time(0));
input(user, raysize);
rand(lot, raysize);
print(lot, user);

/*
    This part is edidted
*/

//as we know compare function is returning some value..
//then store the returned value into some variable...
//store it in match variable and then pass this variable to matches function
match =compare(lot, user);

//pass array and match variable to matches function
matches(match,lot,user);
system("PAUSE");
}

void input(int user[], int raysize)
{
for (int i = 0;i < raysize;i++)
{
cout << "Enter in five numbers from 0-9" << endl;
cin >> user[i];
}
int i = 0;
while (user[i] < 0 || user[i]>9)
{
cout << "Error!" << endl;
exit(1);
}
}

void rand(int lot[], int raysize)
{
for (int i = 0; i < raysize; i++)
{
lot[i] = rand() % 10;
}

}

void print(int lot[], int user[])
{
for (int i = 0; i < 5; i++)
{
  
cout << "Lottery numbers are: "<< lot[i]<< " " << " your numbers are: " << user[i] << endl;
  

}
  
}

int compare(int lot[], int user[])
{
int match = 0;
for (int i = 0;i < 5;++i)
{
if (user[i] == lot[i])
{
match++;
}
}
return match;

  
}

void matches(int match, int lot[], int user[])
{
//print the total number of matches
cout<<"\nTotal matches are: "<<match<<endl;
  
//print lottery array
cout<<"Lottery Array: ";
for(int i=0;i<5;i++)
   cout<<lot[i]<<" ";
  
//print user array
cout<<"\nUser Array: ";
for(int i=0;i<5;i++)
   cout<<user[i]<<" ";
  
cout<<endl<<endl;
}

================

Output