C++

Forum

 
Arrays in functions C++

yak (3)
This code seems to only work while the array (dArray[]) is initialized with a set of given numbers instead of user inputs. This code is supposed to calculate:
*the Minimum
*the Maximum
*average
*root mean squared
*standard deviation
but seems that the numbers are off. Any help would be much appreciated, thanks.

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
 
  #include <iostream>
#include <cmath>

using namespace std;

double GetMax(const double dArray[], int iSize) {
    int iCurrMax = 0;
    for (int i = 1; i < iSize; ++i) {
        if (dArray[iCurrMax] > dArray[i]) {
            iCurrMax = i;
        }
    }
    return dArray[iCurrMax];
}

double GetMin(const double dArray[], int iSize) {
    int iCurrMin = 0;
    for (int i = 1; i < iSize; ++i) {
        if (dArray[iCurrMin] < dArray[i]) {
            iCurrMin = i;
        }
    }
    return dArray[iCurrMin];
}

double GetAverage(const double dArray[], int iSize) {
    double dSum = dArray[0];
    for (int i = 1; i < iSize; ++i) {
        dSum += dArray[i];
    }
    return dSum/iSize;
}

double GetRMS (const double dArray[], int iSize) {
    double dSum = dArray[0];
    for (int i = 1; i < iSize; ++i) {
        dSum += dArray[i];
    }
    return sqrt(dSum/iSize);

}

double GetST(const double dArray[], int iSize) {
    double mean= 0, sum_deviation=0;
    int i;
    for(i=0; i<iSize; ++i)
    {
        mean+=dArray[i];
    }
    mean = mean/iSize;
    for(i=0; i<iSize; ++i)
    sum_deviation +=(dArray[i]-mean)*(dArray[i]-mean);
    return sqrt(sum_deviation/iSize);
}



int main()
{
    double dValues[100];
    int iArraySize;
    int n, i;

    cout << "Enter a number " << endl;
    cin >> n;
    cout << "Enter " << n << " number(s) followed by enter" << endl;
    for (i=0; i<n; ++i){
        cin >> dValues[n];
        iArraySize = n;
    }

    cout << "Min = " << GetMax(dValues, iArraySize) << endl;
    cout << "Max = " << GetMin(dValues, iArraySize) << endl;
    cout << "Average = " << GetAverage(dValues, iArraySize) << endl;
    cout << "Root mean squared = " << GetRMS(dValues, iArraySize) << endl;
    cout << "Standard Deviation = " << GetST(dValues, iArraySize) << endl;

    return 0;
}
helios (17574)
See line 68. Notice any problems?
yak (3)
Is it that I have to change n to a double?
helios (17574)
No. But it is a problem with what's between the brackets.
MiiNiPaa (8886)
Look closer, also look at the previous line, Think, what every varuable means and why is it in that particular place.
yak (3)
I figured it out, I had to change dValues[n] to dValues[i] and works now. Thanks for pointing out where the problem was. Simple mistakes.
Topic archived. No new replies allowed.