Create a table using a 40x5 array of doubles and make sure each column has a...
Create a table using a 40x5 array of doubles and make sure each column has a title. also have the program write the data to a text file
Homework Answers
#include <iostream>
#include <ctime>
#include <cstdlib>
#include <iomanip>
#include <fstream>
using namespace std;
int main()
{
//Declaring a constant
const long m_rand = 1000000L;
//Declaring variables
double x1 = 20.50, x2 = 30.50, x;
srand(time(NULL));
//Declaring double array
double arr[40][5];
//Defines an output stream for the data file
ofstream dataOut;
/* This for lopp will generate double type
* values and populate them into an array
*/
for(int i=0;i<40;i++)
{
for(int j=0;j<5;j++)
{
//Generating double type random values
arr[i][j]= x1 + ( x2 - x1) * (rand() % m_rand) / m_rand;
}
}
//creating and Opening the output file
dataOut.open("D:\\doubleArray.txt");
//This for loop is used to display headings
for(int i=0;i<5;i++)
{
cout<<"col"<<i+1<<"\t";
dataOut<<"col"<<i+1<<"\t";
}
cout<<"\n"<<endl;
dataOut<<"\n"<<endl;
//Setting precision
std::cout << std::setprecision(2) << std::fixed;
//This nested for loop is used to display the elements in the
array
for(int i=0;i<40;i++)
{
for(int j=0;j<5;j++)
{
cout<<arr[i][j]<<"\t";
dataOut<<std::fixed<<
std::setprecision(2)<<arr[i][j]<<"\t";
}
cout<<"\n";
dataOut<<"\n";
}
return 0;
}
______________________
Output:
____________________
doubleArray.txt (We can see this file under D Dive.As we specified the path of the file as D:\\doubleArray.txt)
col1 col2 col3 col4 col5
20.64 20.67 20.56
20.67 20.55
20.81 20.82 20.59
20.81 20.80
20.57 20.63 20.54
20.60 20.69
20.58 20.51 20.69
20.60 20.76
20.53 20.55 20.73
20.51 20.56
20.59 20.79 20.53
20.79 20.62
20.81 20.78 20.77
20.81 20.50
20.68 20.70 20.63
20.62 20.51
20.54 20.75 20.57
20.61 20.53
20.61 20.65 20.65
20.72 20.53
20.64 20.62 20.74
20.81 20.67
20.53 20.76 20.81
20.51 20.70
20.55 20.53 20.75
20.78 20.63
20.55 20.80 20.58
20.62 20.56
20.51 20.58 20.64
20.79 20.81
20.53 20.69 20.70
20.56 20.65
20.55 20.63 20.55
20.55 20.68
20.66 20.51 20.63
20.72 20.70
20.67 20.57 20.79
20.65 20.51
20.80 20.67 20.52
20.60 20.72
20.64 20.70 20.59
20.52 20.67
20.77 20.59 20.62
20.78 20.69
20.71 20.72 20.67
20.74 20.53
20.70 20.64 20.68
20.52 20.77
20.68 20.66 20.79
20.64 20.71
20.77 20.70 20.70
20.77 20.55
20.82 20.73 20.63
20.50 20.63
20.51 20.53 20.67
20.63 20.69
20.78 20.72 20.74
20.75 20.79
20.77 20.57 20.52
20.75 20.51
20.58 20.65 20.58
20.61 20.55
20.71 20.73 20.74
20.61 20.77
20.51 20.66 20.53
20.83 20.70
20.74 20.67 20.80
20.52 20.68
20.52 20.82 20.55
20.65 20.57
20.75 20.70 20.81
20.81 20.67
20.74 20.76 20.58
20.76 20.73
20.65 20.73 20.80
20.82 20.72
20.80 20.69 20.52
20.68 20.60
20.82 20.82 20.57
20.73 20.75
______Thank You
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