C++ Array loop for average

Please try this code: IDEONE

#include <iostream>

using namespace std;

int cole[10];
int sum = 0;

int main()
{
    int a = 10;
    int b = 10;
    int c = 10;
    int d = 10;
    int e = 35;
    double avg = 0;
    cout << "Please input ten numbers, one at a time" << endl;
    for (int i=0;i<10;i++) {
        cin >> cole[i];
    }
    cout << "There will now be 5 assigned variables, so that we have 15 variables" << endl;

    for(int x = 0; x < 10; x++ )
    {
        cout << cole[x] << " ";
        sum += cole[x];
    }
    cout << "and " << a << " " << b << " " << c << " " << d << " " << e << endl;
    cout << "The average of these numbers is: ";
    sum = sum + a + b + c + d + e;
    avg = sum / 15.0;
    cout << avg;

}

Remember that average should not be an integer value - it will round the number to the floor. And remember you can input every value to the array as well in loop, never do it one by one. You also declared the "int sum = 0" again and again in loop, so the global sum was not visible inside the loop. I deleted some of unneeded code too. You can check it out, cheers

    #include <iostream>

using namespace std;

int coleCount = 10;
int cole[coleCount];
int sum = 0;
int main()
{
    int a = 10;
    int b = 10;
    int c = 10;
    int d = 10;
    int e = 35;

    cout << "Please input ten numbers, one at a time" << endl;

    for(int i = 0; i < coleCount; i++)
    {
      cin >> cole[i];  
    }

    cout << "There will now be 5 assigned variables, so that we have 15 variables" << endl;

    for(int i = 0; i < coleCount; i++ )
    {
        cout << cole[i] << " ";
        sum += cole[i];
        //cole[x]++; why are you incrementing this?
    }
    //sum += cole[0]; why?
    //cole[0]++; why?
    cout << "and " << a << " " << b << " " << c << " " << d << " " << e << endl;
    cout << "The average of these numbers is: ";
    sum += (a + b + c + d + e);
    cout << sum / 15;

}

Get rid of int sum = 0 and cole[x]++; inside the loop. Also so lose:

sum += cole[0];
cole[0]++;

after the loop.

int sum = 0;

This needs to be outside the loop, you are continually resetting the sum.

You are declaring sum twice. Remove the declaration from inside the for loop!

for(int x = 0; x < 10; x++ )
{        
    cout << cole[x] << " ";
    sum += cole[x];
    cole[x]++;
}

Fixed code:

#include <iostream>

using namespace std;

int cole[10];
int sum = 0;
int main()
{
    int a = 10;
    int b = 10;
    int c = 10;
    int d = 10;
    int e = 35;
    cout << "Please input ten numbers, one at a time" << endl;
    cin >> cole[0];
    cin >> cole[1];
    cin >> cole[2];
    cin >> cole[3];
    cin >> cole[4];
    cin >> cole[5];
    cin >> cole[6];
    cin >> cole[7];
    cin >> cole[8];
    cin >> cole[9];
    cout << "There will now be 5 assigned variables, so that we have 15 variables" << endl;


    int sum = 0;  //initialize sum outside the for loop
    for(int x = 0; x < 10; x++ )
    {
        cout << cole[x] << " ";
        sum += cole[x];
        cole[x]++;
    }
    //sum += cole[0];  //this seems unnecessary
    //cole[0]++;
    cout << "and " << a << " " << b << " " << c << " " << d << " " << e << endl;
    cout << "The average of these numbers is: ";
    sum = sum + a + b + c + d + e;
    cout << sum / 15;

}