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  1. #include <iostream>
  2. #include <cmath>
  3. #include <fstream>
  4. #include <iomanip>
  5. using namespace std;
  6.  
  7. const int MAXSIZE = 1000;
  8.  
  9.  
  10.  
  11.  
  12. /**
  13. * computes the maximum and minimum values in the data set
  14. * @param data - an array containing the measurements
  15. * @param count - the number of measurements
  16. * @param min - the minimum measurement
  17. * @param max - the maximum measurement
  18. */  
  19.  
  20.    void minMax(const double data [ ], int count, double& min, double& max)
  21.    {
  22.    min = data[0];
  23.    for(count = 0; count<MAXSIZE;)
  24.    {
  25.       count++;
  26.    }
  27.    if (data[count] < min)
  28.    {
  29.       min = data[count];
  30.    }
  31.    max = data[0];
  32.    for(count=0; count<MAXSIZE;)
  33.    {
  34.       count++;
  35.    }
  36.    if(data[count] > max)
  37.    {
  38.          max = data[count];
  39.    }
  40.    double range = max - min;
  41.    cout<<"Min: " <<setprecision(4)<<setw(20)<<min;
  42.    cout<<"Max: " <<setprecision(4)<<setw(20)<<max;
  43.    cout<<"range: " <<setprecision(4)<<setw(18)<<range;
  44.    /**
  45. * computes the sample mean
  46. * @param data - an array containing the measurements
  47. * @param count - the number of measurements
  48. * @return the mean of the set of measurements
  49. */
  50.  
  51.    double calcMean(const double data[ ], int count)
  52.    {
  53.    double sum = 0;
  54.    double mean;
  55.    int i;
  56.       for(i = 0; i < count; i++);
  57.       {
  58.       sum += data[i];
  59.       mean = sum/count;
  60.       }
  61.    return mean;
  62. }
  63. /**
  64. * computes the sample variance
  65. * @param data - an array containing the measurements
  66. * @param count - the number of measurements
  67. * @return the sample variance of the set of measurements
  68. */
  69.  
  70.    double calcVariance(const double data[ ], int count)
  71.    {
  72.    double sum = 0;
  73.    double var = 0;
  74.    double mean;
  75.    int i;
  76.       for(i = 0; i < count; i++);
  77.       {
  78.       sum += data[i];
  79.       mean = sum/count;
  80.       var = pow(data[i]-mean,2);
  81.    }
  82.     return var;
  83. }
  84.  
  85. int main()
  86. {
  87.    double data[MAXSIZE];
  88.    double range, mean, variance, stand_dev;
  89.    string file;
  90.    int count;
  91.    cout<<"Enter the name of the data file>"<<endl;
  92.    cin>>file;
  93.    cout<<endl;
  94.    cout<<"Descriptive Statistics"<<endl;
  95.    cout<<"------------------------------"<<endl;
  96.  
  97.  
  98.    ifstream inputFile;
  99.    inputFile.open("sewage.data");
  100.    if(!inputFile)
  101.    {
  102.       cout<<"error opening File."<<endl;
  103.    }
  104.    while(count = 0,count < MAXSIZE && inputFile >> data[count])
  105.    {
  106.       count++;
  107.    }
  108.     cout<<"N: "<<setw(22);
  109.     cin>>count;
  110.     minMax(data, count, min, max);
  111.     cout<<"range: " <<setprecision(4)<<setw(18);
  112.     mean = calcMean(data, count);
  113.     cout<<"mean:"<<setprecision(4)<<setw<<(19)<<mean<<endl;
  114.     variance = calcVariance(data, count);
  115.     cout<<"variance:"<<setw(15)<<setprecision<<(4)<<variance<<endl;
  116.     stand_dev = sqrt(variance);
  117.     cout<<"Standard Deviation: "<<setw(6)<<setprecision(4)<<stand_dev<<endl;
  118.     inputFile.close();
  119.       return 0;
  120. }
  121.  
Compilation error #stdin compilation error #stdout 0s 0KB
comments (?)
stdin
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Standard input is empty
compilation info 
prog.cpp: In function ‘void minMax(const double*, int, double&, double&)’:
prog.cpp:52:4: error: a function-definition is not allowed here before ‘{’ token
    {
    ^
prog.cpp:120:1: error: expected ‘}’ at end of input
 }
 ^
stdout
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Standard output is empty
https://ideone.com/GA86uG
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
public

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