While and For Loop Program

ericak · #1 11-Mar-2009, 21:38

I have to create the exact same program, one using a for loop and the other using a while loop. The goal of the program is to input 10 numbers and then sum up the odd numbers and the even numbers, respectively. I think I have a good idea of what I'm supposed to do, but I'm stumped on how to sum up the odd and even numbers. It's probably something very simple, but i'm very new to C++. The 2 programs only output "The sum of the even numbers is: 10" (which it's not because I entered the numbers 1-10) and it is supposed to output the sum of the even and odd numbers.
While

CPP / C++ / C Code:

#include <iostream>
using namespace std;
int main()
{
int num;
int sumo = 0; //sum of odd numbers
int sume = 0; //sum of even numbers
int count = 0;
while (count <=9)
{
	cout << "Please enter 10 integer numbers: " << endl;
	cin >> num;
	count++;
}

if (num%2 == 0)
{
	sume += num;
	cout <<"The sum of the even numbers is: " << sume << endl;
	num += 2;
}
if (num%2 == 1) 
{
	sumo += num;
	cout << "The sum of the odd numbers is : " << sumo << endl;
	num += 2;
}	

return 0;
}

For

CPP / C++ / C Code:

#include <iostream>
using namespace std;

int main()

{
int sume = 0;
int sumo = 0;
int num;
int counter;

for (counter = 1; counter <= 10; counter++)
{
	cout << "Please enter an integer number: " << endl;
	cin >> num;
}
	
	if (num % 2 == 0)
	{
		sume += num;
		cout << "The sum of the even numbers is: " << sume << endl;
	}
	if (num % 2 == 1)
	{
		sumo += num;
		cout << "The sum of the odd numbers is: " << sumo << endl;
	}

	
return 0;
}

Peter_APIIT · #2 12-Mar-2009, 01:13

You just put the 10 number in array and do the checking.

CPP / C++ / C Code:

if (number[loop] % == 0 )
{
even+=number[loop];}

else {}

Mexican Bob · #3 12-Mar-2009, 05:45

Perhaps something like this (both combined into one program):

CPP / C++ / C Code:

#include <iostream>
#include <cstring>

using namespace std;

int main()
{
    int numbers[10]      = {0};
    int sum_odd_numbers  = 0;
    int sum_even_numbers = 0;

    size_t count         = 0;
    
    while(count < sizeof(numbers)/sizeof(int))
    {
	cout << "Enter an integer: " << endl;
	cin >> numbers[count];
	if(numbers[count] % 2 == 0)
	{
	    sum_even_numbers += numbers[count];
	}
	else
	{
	    sum_odd_numbers  += numbers[count];
	}
	++count;
    }
    cout << "The sum of odd  numbers is " << sum_odd_numbers  << endl;
    cout << "The sum of even numbers is " << sum_even_numbers << endl;

    memset(numbers, 0, sizeof(numbers));
    sum_odd_numbers  = 0;
    sum_even_numbers = 0;

    for(count = 0; count < sizeof(numbers)/sizeof(int); count++)
    {
	cout << "Enter an integer: " << endl;
	cin >> numbers[count];
	if(numbers[count] % 2 == 0)
	{
	    sum_even_numbers += numbers[count];
	}
	else
	{
	    sum_odd_numbers  += numbers[count];
	}
    }
    cout << "The sum of odd  numbers is " << sum_odd_numbers  << endl;
    cout << "The sum of even numbers is " << sum_even_numbers << endl;

    return 0;
}

MxB

ericak · #4 12-Mar-2009, 11:24

Thank you! I see that I almost had it correct, I just had the if/else statements in the wrong place.
Thanks again, you were a lot of help.

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While and For Loop Program

Re: While and For Loop Program

Re: While and For Loop Program

Re: While and For Loop Program