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rand () funtion

 
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rand () funtion
loulz
23 Oct, 2006 - 12:48 PM
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I need to write a program that helps a student learn the multiplication table from 2 to 9 by asking him questions like "what is 3 *8" using the rand function.

can someone plz explain to me what is the rand?
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Amadeus
RE: Rand () Funtion
23 Oct, 2006 - 02:51 PM
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The rand() function generates pseudo random numbers for use in various applications. Don't forget to see with srand() first.

http://www.cplusplus.com/ref/cstdlib/rand.html
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loulz
RE: Rand () Funtion
23 Oct, 2006 - 09:23 PM
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CODE
#include <iostream>
#include <cstdlib>
using namespace std;
int main()
{
    
    for (int i=2; i<=9; i++)
    {
        i=rand();
        int num1=rand()%10;
        int num2=rand()%10;
        int p=num1*num2;
        cout<<"How much is "<<num1<<" times "<<num2<<"?";
        cin>>p;
        int r;
        r=p;
        

            while (r=p)
            {
                cout<<"Very Good!"<<endl;
                cout<<"How much is "<<num1<<" times "<<num2<<"?";
                cin>>r;
            }
        if (r!=p)
                cout<<"No. Try Again."<<endl;
                
    }
    return 0;
}


ok i get what the rand() function is. but now i only seem to get 2 numbers repeating over and over which are 7 times 4. how can i make the next question (how much is num1 times num2) have different values for num1 and num2.. ?
also, if the person enters the wrong answer, how can i make the same question reappear?
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