Programming Forums > Application Development > C++

imagikricei · Jun 8th, 2006, 7:55 PM

I need help finding a minimum and maximum of random numbers.
what my program does it asks for a number and it outputs that many random numbers between the range of 0-100. It also finds the number of values, sum and the average. what im having problem is i dont know how to output the maximum and minimum values of the generated random numbers. any ideas guys?

(Toggle Plain Text)

#include <cstdlib>
#include <iostream>
#include <ctime>
#include <algorithm>

using namespace std;

int main()
{
	double n, sum=0;
	cout << "Enter a number: " << endl;
	cin >> n;

	unsigned seed = time(NULL);
	srand(seed);
	int range = 101;
	for (int i = 0; i < n; i++)
	{
		int myrand = rand()/100%range;
		cout << myrand << " " << endl;
		
		sum += myrand;
		
		
	
	}
	cout << "There are " << n << " values." << endl;
	cout << "The sum is " << sum << endl;
	cout << "The average is " << (sum/n) << endl;
	
	return 0;
}

Wizard1988 · Jun 8th, 2006, 8:03 PM

#1 Use code tags
#2 Explain what is wrong with your code

splinter9x · Jun 8th, 2006, 8:27 PM

He did explain, he wants to know how to do somthing, this is not a code error... And he did use code tags, hence the code being in the box....

Kilo · Jun 8th, 2006, 8:29 PM

(Toggle Plain Text)

#include <iostream>
#include <conio.h>

int main()
{
	int i_numArray[5] = { 45, 12, 67, 34, 96 };
	int i_min = 100, i_max = 0;

	for ( int i = 0; i <= 4; i++ )
	{
		if ( i_numArray[i] != i_min && i_numArray[i] < i_min )
			i_min = i_numArray[i];
		else if ( i_numArray[i] != i_max && i_numArray[i] > i_max )
			i_max = i_numArray[i];
	}
	
	std::cout << "Min: " << i_min << std::endl;
	std::cout << "Max: " << i_max;

	getch();

	return 0;
}

output:

(Toggle Plain Text)

Min: 12
Max: 96

splinter9x: he could have edited his post?

Wizard1988 · Jun 8th, 2006, 8:33 PM

You need to use if statements and compare the numbers each time they are generated. Keep the lowest one in one variable and the largest number in another. Next simply compare each of the following numbers which were generated to those.

Just Like Kilo did

imagikricei · Jun 8th, 2006, 8:44 PM

your numbers were already set. i need it to find max and min of random numbers.
i was told this function works fairly well with finding max and min. problem is i dont know how to put it into my code. can somebody help me out.

#include <algorithm>
...

int x1 = 10, x2 = 20, minval, maxval;
minval = min(x1, x2);
maxval = max(x1, x2);

hey kilo, i tested your source and it only output the min

Kilo · Jun 8th, 2006, 9:22 PM

here!

(Toggle Plain Text)

#include <cstdlib>
#include <iostream>
#include <ctime>
#include <algorithm>
#include <conio.h>
#include <vector>

using namespace std;

int main()
{
	double n, sum=0;
	std::vector<int> v_numArray(0x0);
	int i_min = 100, i_max = 0;
	
	cout << "Enter a number: " << endl;
	cin >> n;

	unsigned seed = time(NULL);

	srand(seed);

	int range = 101;

	for (int i = 0; i < n; i++)
	{
		int myrand = rand()/100%range;
		cout << myrand << " " << endl;
		
		v_numArray.push_back(myrand);

		sum += myrand;
	}
	cout << "There are " << n << " values." << endl;
	cout << "The sum is " << sum << endl;
	cout << "The average is " << (sum/n) << endl;

	for ( int i = 0; i < v_numArray.size(); i++ )
	{
		if ( v_numArray[i] != i_min && v_numArray[i] < i_min )
			i_min = v_numArray[i];
		else if ( v_numArray[i] != i_max && v_numArray[i] > i_max )
			i_max = v_numArray[i];
	}

	cout << "Min: " << i_min << endl;
	cout << "Max: " << i_max << endl;

	getch();

	return 0;
}

im not using algorithm.. so use my code or have someone else do it?

imagikricei · Jun 8th, 2006, 10:13 PM

thanks for the help kilo. its just that i haven't learned how to use what you're using in your code yet. but thanks again for the help.

Kilo · Jun 8th, 2006, 10:14 PM

does it work ok for you??

imagikricei · Jun 8th, 2006, 10:33 PM

yeah it definately works i just dont understand the code.

Jun 8th, 2006, 8:27 PM	#3
splinter9x Hobbyist Programmer Join Date: Jun 2006 Posts: 137 Rep Power: 0	He did explain, he wants to know how to do somthing, this is not a code error... And he did use code tags, hence the code being in the box.... __________________ Visit my Blog I support WINDOWS...

Jun 8th, 2006, 8:29 PM	#4
Kilo Expert Programmer Join Date: Nov 2005 Location: In Pink Clam? Posts: 542 Rep Power: 0	(Toggle Plain Text) #include <iostream> #include <conio.h> int main() { int i_numArray[5] = { 45, 12, 67, 34, 96 }; int i_min = 100, i_max = 0; for ( int i = 0; i <= 4; i++ ) { if ( i_numArray[i] != i_min && i_numArray[i] < i_min ) i_min = i_numArray[i]; else if ( i_numArray[i] != i_max && i_numArray[i] > i_max ) i_max = i_numArray[i]; } std::cout << "Min: " << i_min << std::endl; std::cout << "Max: " << i_max; getch(); return 0; } #include <iostream> #include <conio.h> int main() { int i_numArray[5] = { 45, 12, 67, 34, 96 }; int i_min = 100, i_max = 0; for ( int i = 0; i <= 4; i++ ) { if ( i_numArray[i] != i_min && i_numArray[i] < i_min ) i_min = i_numArray[i]; else if ( i_numArray[i] != i_max && i_numArray[i] > i_max ) i_max = i_numArray[i]; } std::cout << "Min: " << i_min << std::endl; std::cout << "Max: " << i_max; getch(); return 0; } output: (Toggle Plain Text) Min: 12 Max: 96 Min: 12 Max: 96 splinter9x: he could have edited his post? __________________ "When in Rome, Do as the Romans Do" "Beauty is in the eye of the BEER holder" "Save your breath your going to need it for your blow up doll later" SearchLores.org

Jun 8th, 2006, 8:44 PM	#6
imagikricei Newbie Join Date: Jun 2006 Location: texas Posts: 22 Rep Power: 0	your numbers were already set. i need it to find max and min of random numbers. i was told this function works fairly well with finding max and min. problem is i dont know how to put it into my code. can somebody help me out. #include <algorithm> ... int x1 = 10, x2 = 20, minval, maxval; minval = min(x1, x2); maxval = max(x1, x2); hey kilo, i tested your source and it only output the min Last edited by imagikricei; Jun 8th, 2006 at 8:56 PM.

Jun 8th, 2006, 9:22 PM	#7
Kilo Expert Programmer Join Date: Nov 2005 Location: In Pink Clam? Posts: 542 Rep Power: 0	here! (Toggle Plain Text) #include <cstdlib> #include <iostream> #include <ctime> #include <algorithm> #include <conio.h> #include <vector> using namespace std; int main() { double n, sum=0; std::vector<int> v_numArray(0x0); int i_min = 100, i_max = 0; cout << "Enter a number: " << endl; cin >> n; unsigned seed = time(NULL); srand(seed); int range = 101; for (int i = 0; i < n; i++) { int myrand = rand()/100%range; cout << myrand << " " << endl; v_numArray.push_back(myrand); sum += myrand; } cout << "There are " << n << " values." << endl; cout << "The sum is " << sum << endl; cout << "The average is " << (sum/n) << endl; for ( int i = 0; i < v_numArray.size(); i++ ) { if ( v_numArray[i] != i_min && v_numArray[i] < i_min ) i_min = v_numArray[i]; else if ( v_numArray[i] != i_max && v_numArray[i] > i_max ) i_max = v_numArray[i]; } cout << "Min: " << i_min << endl; cout << "Max: " << i_max << endl; getch(); return 0; } #include <cstdlib> #include <iostream> #include <ctime> #include <algorithm> #include <conio.h> #include <vector> using namespace std; int main() { double n, sum=0; std::vector<int> v_numArray(0x0); int i_min = 100, i_max = 0; cout << "Enter a number: " << endl; cin >> n; unsigned seed = time(NULL); srand(seed); int range = 101; for (int i = 0; i < n; i++) { int myrand = rand()/100%range; cout << myrand << " " << endl; v_numArray.push_back(myrand); sum += myrand; } cout << "There are " << n << " values." << endl; cout << "The sum is " << sum << endl; cout << "The average is " << (sum/n) << endl; for ( int i = 0; i < v_numArray.size(); i++ ) { if ( v_numArray[i] != i_min && v_numArray[i] < i_min ) i_min = v_numArray[i]; else if ( v_numArray[i] != i_max && v_numArray[i] > i_max ) i_max = v_numArray[i]; } cout << "Min: " << i_min << endl; cout << "Max: " << i_max << endl; getch(); return 0; } im not using algorithm.. so use my code or have someone else do it? __________________ "When in Rome, Do as the Romans Do" "Beauty is in the eye of the BEER holder" "Save your breath your going to need it for your blow up doll later" SearchLores.org

Jun 8th, 2006, 10:14 PM	#9
Kilo Expert Programmer Join Date: Nov 2005 Location: In Pink Clam? Posts: 542 Rep Power: 0	does it work ok for you?? __________________ "When in Rome, Do as the Romans Do" "Beauty is in the eye of the BEER holder" "Save your breath your going to need it for your blow up doll later" SearchLores.org

Jun 8th, 2006, 7:55 PM	#1
imagikricei Newbie Join Date: Jun 2006 Location: texas Posts: 22 Rep Power: 0	Finding Random Min and Max I need help finding a minimum and maximum of random numbers. what my program does it asks for a number and it outputs that many random numbers between the range of 0-100. It also finds the number of values, sum and the average. what im having problem is i dont know how to output the maximum and minimum values of the generated random numbers. any ideas guys? (Toggle Plain Text) #include <cstdlib> #include <iostream> #include <ctime> #include <algorithm> using namespace std; int main() { double n, sum=0; cout << "Enter a number: " << endl; cin >> n; unsigned seed = time(NULL); srand(seed); int range = 101; for (int i = 0; i < n; i++) { int myrand = rand()/100%range; cout << myrand << " " << endl; sum += myrand; } cout << "There are " << n << " values." << endl; cout << "The sum is " << sum << endl; cout << "The average is " << (sum/n) << endl; return 0; } #include <cstdlib> #include <iostream> #include <ctime> #include <algorithm> using namespace std; int main() { double n, sum=0; cout << "Enter a number: " << endl; cin >> n; unsigned seed = time(NULL); srand(seed); int range = 101; for (int i = 0; i < n; i++) { int myrand = rand()/100%range; cout << myrand << " " << endl; sum += myrand; } cout << "There are " << n << " values." << endl; cout << "The sum is " << sum << endl; cout << "The average is " << (sum/n) << endl; return 0; } Last edited by imagikricei; Jun 8th, 2006 at 8:13 PM.

Jun 8th, 2006, 8:03 PM	#2
Wizard1988 Professional Programmer Join Date: Oct 2005 Location: Chitown Posts: 422 Rep Power: 4	#1 Use code tags #2 Explain what is wrong with your code

Jun 8th, 2006, 8:33 PM	#5
Wizard1988 Professional Programmer Join Date: Oct 2005 Location: Chitown Posts: 422 Rep Power: 4	You need to use if statements and compare the numbers each time they are generated. Keep the lowest one in one variable and the largest number in another. Next simply compare each of the following numbers which were generated to those. Just Like Kilo did

Jun 8th, 2006, 10:13 PM	#8
imagikricei Newbie Join Date: Jun 2006 Location: texas Posts: 22 Rep Power: 0	thanks for the help kilo. its just that i haven't learned how to use what you're using in your code yet. but thanks again for the help.

Jun 8th, 2006, 10:33 PM	#10
imagikricei Newbie Join Date: Jun 2006 Location: texas Posts: 22 Rep Power: 0	yeah it definately works i just dont understand the code.

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Programming Forums > Application Development > C++

Finding Random Min and Max