Programming Forums > Application Development > C++

HaCkeR · Nov 29th, 2005, 1:43 PM

Im need the code for C++ that generates arandom number. If you can give it me then please do

coldDeath · Nov 29th, 2005, 1:47 PM

http://www.cprogramming.com/tutorial/random.html

Googling wasn't too hard

HaCkeR · Nov 29th, 2005, 1:50 PM

I never got anything of google for some reason

HaCkeR · Nov 29th, 2005, 2:28 PM

ive sorted that now but heres my code for some reason i think the while loop is stoping from working can somebody help me plz.

(Toggle Plain Text)

#include <cstdlib>
#include <iostream>

using namespace std;

int main()
{
    int x;
    int guess;
    int a = 1;
    int random_integer = rand();
    
while (a < 5);
    cout<<"Enter a number:";
    cin>>guess;
    cin.ignore();
    if (guess < random_integer) {
          cout<<"Guess Higher";
          };
    if (guess > random_integer) {
          cout<<"Guess Lower";
          };
    if (guess == random_integer) {
          cout<<"Congratulations,You WIN!";
    int a = 10;
          };
cin.get();
}

it is my first C++ program so thats why it doesnt work

-=PARADOX=- · Nov 29th, 2005, 2:38 PM

I guess you want to do this:

(Toggle Plain Text)

        int guess;
        int random_integer = rand();

        do{
                cout<<"Enter a number:";
                cin>>guess;
                cin.ignore();
                if (guess < random_integer)
                {
                        cout<<"Guess Higher";
                }
                if (guess > random_integer)
                {
                        cout<<"Guess Lower";
                }
                if (guess == random_integer)
                {
                        cout<<"Congratulations,You WIN!";
                }
        } while ( guess!=random_integer );

        cin.get();

groovicus · Nov 29th, 2005, 2:42 PM

"It doesn't work" is pretty vague. Maybe a description of what is happening would help? Why do you have semi-colons after your closing braces after the IF statements?

teencoder · Nov 29th, 2005, 3:27 PM

First you need to seed the random generater. Here's some code and I'll explain it.

(Toggle Plain Text)

#include <time.h>
#include <cstdlib>
#include <iostream>
#include <conio.h>
using namespace std;
int num;
int guess;
int main()
{
    srand(time(0));  // seeds the random generator no changes necessary no matter what
	num = rand()%(10-1+1);  // a mathmatical formula for random integers take the random number and modulus it by max-1+min
	while (num!=guess)
		{
			cout << "Guess my number it's 1-10" << endl;
			cin >> guess;
		}
	cout << endl << "you guessed it";
	getch();
	return 0;
}

enjoy

Ooble · Nov 29th, 2005, 6:20 PM

Quote:

Originally Posted by HaCkeR

(Toggle Plain Text)

int a = 10;

There's your problem. You're redeclaring a in the scope of the loop. You want a = 10; - no int.

Quote:

Originally Posted by HaCkeR

it is my first C++ program so thats why it doesnt work

Actually, the reason above is why it doesn't work.

Mocker · Nov 29th, 2005, 6:28 PM

You don't need to seed the rand function. If you dont you'll get the same string of random numbers everytime you run it, but its not a requirement to running the program.

tempest · Nov 29th, 2005, 6:35 PM

If making a random number program produce random numbers is not a requirement to expect from trying to making a number guessing game then i guess neither is user-input..

Nov 29th, 2005, 1:43 PM	#1
HaCkeR Hobbyist Programmer Join Date: Nov 2005 Location: UK Posts: 131 Rep Power: 0	Random Number Im need the code for C++ that generates arandom number. If you can give it me then please do

Nov 29th, 2005, 1:47 PM	#2
coldDeath Expert Programmer Join Date: Aug 2005 Location: UK Posts: 862 Rep Power: 4	http://www.cprogramming.com/tutorial/random.html Googling wasn't too hard __________________ Programming Tutorials - Linux Installation Guide - Learn Python - Learn C++ Got Slack? Join us at #programmingforums @ irc.freenode.net! My software never has bugs. It just develops random features.

Nov 29th, 2005, 2:28 PM	#4
HaCkeR Hobbyist Programmer Join Date: Nov 2005 Location: UK Posts: 131 Rep Power: 0	ive sorted that now but heres my code for some reason i think the while loop is stoping from working can somebody help me plz. (Toggle Plain Text) #include <cstdlib> #include <iostream> using namespace std; int main() { int x; int guess; int a = 1; int random_integer = rand(); while (a < 5); cout<<"Enter a number:"; cin>>guess; cin.ignore(); if (guess < random_integer) { cout<<"Guess Higher"; }; if (guess > random_integer) { cout<<"Guess Lower"; }; if (guess == random_integer) { cout<<"Congratulations,You WIN!"; int a = 10; }; cin.get(); } #include <cstdlib> #include <iostream> using namespace std; int main() { int x; int guess; int a = 1; int random_integer = rand(); while (a < 5); cout<<"Enter a number:"; cin>>guess; cin.ignore(); if (guess < random_integer) { cout<<"Guess Higher"; }; if (guess > random_integer) { cout<<"Guess Lower"; }; if (guess == random_integer) { cout<<"Congratulations,You WIN!"; int a = 10; }; cin.get(); } it is my first C++ program so thats why it doesnt work

Nov 29th, 2005, 2:38 PM	#5
-=PARADOX=- Programmer Join Date: Oct 2005 Location: Portugal Posts: 53 Rep Power: 3	I guess you want to do this: (Toggle Plain Text) int guess; int random_integer = rand(); do{ cout<<"Enter a number:"; cin>>guess; cin.ignore(); if (guess < random_integer) { cout<<"Guess Higher"; } if (guess > random_integer) { cout<<"Guess Lower"; } if (guess == random_integer) { cout<<"Congratulations,You WIN!"; } } while ( guess!=random_integer ); cin.get(); int guess; int random_integer = rand(); do{ cout<<"Enter a number:"; cin>>guess; cin.ignore(); if (guess < random_integer) { cout<<"Guess Higher"; } if (guess > random_integer) { cout<<"Guess Lower"; } if (guess == random_integer) { cout<<"Congratulations,You WIN!"; } } while ( guess!=random_integer ); cin.get();

Nov 29th, 2005, 2:42 PM	#6
groovicus Programmer Join Date: Nov 2004 Posts: 84 Rep Power: 4	"It doesn't work" is pretty vague. Maybe a description of what is happening would help? Why do you have semi-colons after your closing braces after the IF statements? __________________ HijackThis Team-SFDC

Nov 29th, 2005, 1:50 PM	#3
HaCkeR Hobbyist Programmer Join Date: Nov 2005 Location: UK Posts: 131 Rep Power: 0	I never got anything of google for some reason

Nov 29th, 2005, 3:27 PM	#7
teencoder Hobbyist Programmer Join Date: Jul 2005 Posts: 158 Rep Power: 0	First you need to seed the random generater. Here's some code and I'll explain it. (Toggle Plain Text) #include <time.h> #include <cstdlib> #include <iostream> #include <conio.h> using namespace std; int num; int guess; int main() { srand(time(0)); // seeds the random generator no changes necessary no matter what num = rand()%(10-1+1); // a mathmatical formula for random integers take the random number and modulus it by max-1+min while (num!=guess) { cout << "Guess my number it's 1-10" << endl; cin >> guess; } cout << endl << "you guessed it"; getch(); return 0; } #include <time.h> #include <cstdlib> #include <iostream> #include <conio.h> using namespace std; int num; int guess; int main() { srand(time(0)); // seeds the random generator no changes necessary no matter what num = rand()%(10-1+1); // a mathmatical formula for random integers take the random number and modulus it by max-1+min while (num!=guess) { cout << "Guess my number it's 1-10" << endl; cin >> guess; } cout << endl << "you guessed it"; getch(); return 0; } enjoy __________________ Geeks may not be cool now but in the long run they prosper.

Nov 29th, 2005, 6:28 PM	#9
Mocker Hobbyist Programmer Join Date: Oct 2005 Location: Indiana Posts: 218 Rep Power: 0	You don't need to seed the rand function. If you dont you'll get the same string of random numbers everytime you run it, but its not a requirement to running the program. __________________ #programmingforums relay - http://thegupstudio.com/cgi-bin/pforelay.cgi freelance scripts - http://ryanguthrie.com/index.html

Nov 29th, 2005, 6:35 PM	#10
tempest Programming Guru Join Date: Oct 2004 Posts: 1,041 Rep Power: 5	If making a random number program produce random numbers is not a requirement to expect from trying to making a number guessing game then i guess neither is user-input.. __________________

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Programming Forums > Application Development > C++

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