random numbers

postpost (10)
i want to create a function that will loop 10 times and see how many of each number occurred but i think im missing something for my code will not compile but i don't know what?

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#include <iomanip>
#include <iostream>
#include <stdio.h>
#include <conio.h>
#include <cstdlib>
#include <ctime>
using namespace std;

int main()
    {
	
        const int n=5,ntimes=10000;
        int freq[n]={0};
        short int rndseq[]={19,50,78,161,252};
    
        retrand(freq,n,ntimes);
    
    cout<<rndseq[i]<<" occured "<<
    freq[i]<<" times"<<endl   

}


Duthomhas (13282)
What does your retrand() function look like?

[edit] BTW, you can use the count() STL algorithm to count the number of times a number appears in a sequence.
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#include <algorithm>
...

int random_sequence[ 10 ] = { 19, -7, 2, 38, -7, 5, 10024, 2, 5, 9 };

cout << "-7 appears "
     << count( random_sequence, random_sequence +10, -7 )
     << " times\n";
Last edited on
postpost (10)
hmmm its still not working for me?

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#include <iomanip>
#include <iostream>
#include <stdio.h>
#include <algorithm>
#include <conio.h>
#include <cstdlib>
#include <ctime>
using namespace std;
void Menu();
int getN();
void def(int);
void problem1();
void problem2();
void multiple();
void retrand();
void problem5();
void problem6();
void problem7();
void multiple();    
    int main(int argv,char *argc[])
    {
	int inN;
        do{
         Menu();
         inN=getN();
         switch(inN){
          case 1:    problem1();break;
          case 2:    problem2();break;
          case 3:    multiple();break;
          case 4:    retrand();break;
          case 5:    problem5();break;
          case 6:    problem6();break;
          case 7:    problem7();break;
          default:   def(inN);}
        }while(inN<8);
        return 1;
    }
    void Menu()
    {
           cout<<"Type 1 for problem 1"<<endl;
           cout<<"Type 2 for problem 2"<<endl;
           cout<<"Type 3 for problem 3"<<endl;
           cout<<"Type 4 for problem 4"<<endl;
           cout<<"Type 5 for problem 5"<<endl;
           cout<<"Type 6 for problem 6"<<endl;
           cout<<"Type 7 for problem 6"<<endl;
           cout<<"Type 8 to exit \n"<<endl;
    }
    int getN()
    {
           int inN;
		   cin>>inN;
           return inN;
    }
    void problem1()////////////////////////
    {
     
  	  
    void problem1 ();
     unsigned short n,s=0;
    cout<<"please enter a number ";
    scanf ("%d",&n);
    while (n!= 0)
    {
        s = (10 * s) + n % 10;
        n = n / 10;
    }
    printf ("The Reversed Number is %d",s);
    getch ();  
        system("CLS");	
        
	 		
    }
    void problem2()/////////////////////////
    {
    int hidenum,guess,stop = 0;
    char choice;
    srand(time(NULL));
    hidenum = rand() % 1000 + 1;
     while(hidenum != guess)
     {
          cout<<"guess a number from 1 to 1000: "<<endl;
          cin >>guess; 
    if(hidenum < guess) 
    {
           cout<<"The secret number is lower"<<endl;
           stop++;
    } 
    if(hidenum > guess)
    {
           cout<<"the secret number is higher"<<endl;
           stop++;
    }
    if(hidenum == guess)
    {
           cout<<"you did it you won!!!"<<endl;
           system("pause");
           cout<<"would you like to play agian y for yes n for no?"<<endl;
           cin >>choice; 
              if(choice == 'Y'|| choice == 'y')    
                  {
                      cout<<"yahh thats the spirit!!"<<endl;
                      system("pause");
                      system("CLS");
                      return  problem2();
                  }
              if (choice == 'N'|| choice == 'n')    
                 {
                      cout<<"noooooo.. you lose!!"<<endl;
                      system("pause");
                      system("CLS");
                      return  Menu();
                 }
     }
     if(stop > 9)
     {
           cout<<"you failed to find the number"<<endl;
           cout<<"would you like to play agian y for yes n for no?"<<endl;
           system("pause");
           cin >>choice;
              if(choice == 'Y'|| choice == 'y')    
                  {
                      cout<<"yahh thats the spirit!!"<<endl;
                      system("pause");
                      system("CLS");
                      return  problem2();
                  }
              if (choice == 'N'|| choice == 'n')    
                  {
                      cout<<"noooooo.. you lose!!"<<endl;
                      system("pause");
                      system("CLS");
                      return  Menu();
                  }  
     }
    }
    }
    void multiple(int x, int y)
    {
    
   {
     if(y%x == 0)
     system("pause");
     return Menu();
     
   }
    
    }
    void retrand()////////////////////////
    {
	
        const int n=5,ntimes=10000;
        int freq[n]={0};
        short int rndseq[]={19,50,78,161,252};
    
        retrand(freq,n,ntimes);
    
    cout<<rndseq[i]<<" occured "<<
    freq[i]<<" times"<<endl;
    
    
    }
    void problem5()////////////////////////////
    {	
    }
    void problem6()
	{	   	   
   	}
    void problem7()
	{	   
	}
	void def(int inN)
    {
     
      {
           cout<<"You typed "<<inN<<" to exit the program"<<endl;
      }
    
    }
    void multiple()
    {
    
    int multiple(int,int);
    int a,b,ans;
      cout<<endl;
       cout<<"Enter two numbers : ";
       cin>>a>>b;
       ans=multiple(a,b);
    if(ans==0)
       cout<<b<<" is a multiple of "<<a;
    else
       cout<<b<<" is not a multiple of "<<a;
    
    cout<<endl;
    
    }

    void retrand()
    {
          
    short int rndseq[ 10000 ] = { 19,50,78,161,252 };

     cout << "50 appears "
     << count( rndseq[i], freq[i] +10000, 50 )
     << " times\n";

     cout << "78 appears "
     << count( rndseq[i], freq[i] +10000, 78 )
     << " times\n";   

    cout << "161 appears "
     << count( rndseq[i], freq[i] +10000, 161 )
     << " times\n";

    cout << "252 appears "
     << count( rndseq[i], freq[i] +10000, 252 )
     << " times\n";

  
    }

Mitsakos (343)
You have two times the function retrand() with different contents...
Also line 156: retrand(freq,n,ntimes); there is no overloaded function of retrand that takes 3 arguments...

Also int the multiple() function you have int multiple(int,int); But the only multiple(int, int) you have is void type, so change it to void multiple(int,int);
Last edited on
postpost (10)
well i got all the bugs out but problem four still gives me 0 for how many times 


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#include <iomanip>
#include <iostream>
#include <stdio.h>
#include <algorithm>
#include <conio.h>
#include <cstdlib>
#include <ctime>
using namespace std;
void Menu();
int getN();
void def(int);
void problem1();
void problem2();
void multiple();
void problem4();
void problem5();
void problem6();
void problem7();
void multiple();    
    int main(int argv,char *argc[])
    {
	int inN;
        do{
         Menu();
         inN=getN();
         switch(inN){
          case 1:    problem1();break;
          case 2:    problem2();break;
          case 3:    multiple();break;
          case 4:    problem4();break;
          case 5:    problem5();break;
          case 6:    problem6();break;
          case 7:    problem7();break;
          default:   def(inN);}
        }while(inN<8);
        return 1;
    }
    void Menu()
    {
           cout<<"Type 1 for problem 1"<<endl;
           cout<<"Type 2 for problem 2"<<endl;
           cout<<"Type 3 for problem 3"<<endl;
           cout<<"Type 4 for problem 4"<<endl;
           cout<<"Type 5 for problem 5"<<endl;
           cout<<"Type 6 for problem 6"<<endl;
           cout<<"Type 7 for problem 6"<<endl;
           cout<<"Type 8 to exit \n"<<endl;
    }
    int getN()
    {
           int inN;
		   cin>>inN;
           return inN;
    }
    void problem1()////////////////////////
    {
     
  	  
    void problem1 ();
     unsigned short n,s=0;
    cout<<"please enter a number ";
    scanf ("%d",&n);
    while (n!= 0)
    {
        s = (10 * s) + n % 10;
        n = n / 10;
    }
    printf ("The Reversed Number is %d",s);
    getch ();  
        system("CLS");	
        
	 		
    }
    void problem2()/////////////////////////
    {
    int hidenum,guess,stop = 0;
    char choice;
    srand(time(NULL));
    hidenum = rand() % 1000 + 1;
     while(hidenum != guess)
     {
          cout<<"guess a number from 1 to 1000: "<<endl;
          cin >>guess; 
    if(hidenum < guess) 
    {
           cout<<"The secret number is lower"<<endl;
           stop++;
    } 
    if(hidenum > guess)
    {
           cout<<"the secret number is higher"<<endl;
           stop++;
    }
    if(hidenum == guess)
    {
           cout<<"you did it you won!!!"<<endl;
           system("pause");
           cout<<"would you like to play agian y for yes n for no?"<<endl;
           cin >>choice; 
              if(choice == 'Y'|| choice == 'y')    
                  {
                      cout<<"yahh thats the spirit!!"<<endl;
                      system("pause");
                      system("CLS");
                      return  problem2();
                  }
              if (choice == 'N'|| choice == 'n')    
                 {
                      cout<<"noooooo.. you lose!!"<<endl;
                      system("pause");
                      system("CLS");
                      return  Menu();
                 }
     }
     if(stop > 9)
     {
           cout<<"you failed to find the number"<<endl;
           cout<<"would you like to play agian y for yes n for no?"<<endl;
           system("pause");
           cin >>choice;
              if(choice == 'Y'|| choice == 'y')    
                  {
                      cout<<"yahh thats the spirit!!"<<endl;
                      system("pause");
                      system("CLS");
                      return  problem2();
                  }
              if (choice == 'N'|| choice == 'n')    
                  {
                      cout<<"noooooo.. you lose!!"<<endl;
                      system("pause");
                      system("CLS");
                      return  Menu();
                  }  
     }
    }
    }
    void multiple(int x, int y)
    {
    
   {
     if(y%x == 0)
     system("pause");
     return Menu();
     
   }
    
    }
    void problem4()////////////////////////
    {
	  
 
   int random_sequence[ 10000 ] = { 19, 50, 78, 161, 252};

    
   cout << "19 appears "
     << count( random_sequence, random_sequence +10000, -19 )
     << " times\n";
   
   cout << "50 appears "
     << count( random_sequence, random_sequence +10000, -50 )
     << " times\n";
   
   cout << "78 appears "
     << count( random_sequence, random_sequence +10000, -78 )
     << " times\n";
   
   cout << "161 appears "
     << count( random_sequence, random_sequence +10000, -161 )
     << " times\n";
    
    cout << "252 appears "
     << count( random_sequence, random_sequence +10000, -252 )
     << " times\n";
    
    
    
    }
    void problem5()////////////////////////////
    {	
    
    }
    void problem6()
	{	   	   
   	}
    void problem7()
	{	   
	}
	void def(int inN)
    {
     
      {
           cout<<"You typed "<<inN<<" to exit the program"<<endl;
      }
    
    }
    void multiple()
    {
    
    int multiple(int,int);
    int a,b,ans;
      cout<<endl;
       cout<<"Enter two numbers : ";
       cin>>a>>b;
       ans=multiple(a,b);
    if(ans==0)
       cout<<b<<" is a multiple of "<<a;
    else
       cout<<b<<" is not a multiple of "<<a;
    
    cout<<endl;
    
    }

Mitsakos (343)
That's true...
You are looking for numbers: -19, -50, -78, -161, -252.
But you array has: 19, 50, 78, 161, 252.

In Duoas's example he has "-7" because in his array he has a value of -7...


Also in your void multiple() function you have int multiple(int,int); but the only multiple(int, int) you have is void... you can't have it there as int... Also you cann't return something from a void function. And more another function return Menu();. I'm wondering how it compiles without errors...
Zaita (2770)
i want to create a function that will loop 10 times and see how many of each number occurred but i think im missing something for my code will not compile but i don't know what?


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map<int,int> mList;

int newRandom = getRandomNumber();

mList[newRandom] += 1; // It defaults to 0

// Now, u can iterator through mList and get all the entries.
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