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Calculate an Array of Voltages Using Arrays for Currents and
Resistances
% cat volts.cpp
// one-dimensional array program - calculate V = IR
#include <iostream>
#include <iomanip>
using namespace std;
int main()
{
const int MAX = 20;
int i, NUM_VOLTS;
double current[MAX], resistance[MAX], volts[MAX];
cout << "Enter the number of volts calculations
(<=20): ";
cin >> NUM_VOLTS;
for (i = 0; i < NUM_VOLTS; i++ )
{
cout << "Enter a current value:";
cin >> current[i];
cout << "Enter a resistance
value:";
cin >> resistance[i];
}
// calculate the volts
for (i = 0; i < NUM_VOLTS; i++ )
{
volts[i] = current[i] *
resistance[i];
}
// display results
cout.setf(ios::fixed);
cout.setf(ios::showpoint);
cout.precision(1);
cout << "\nCurrent
Resistance Volts" << endl;
for (i = 0; i< NUM_VOLTS; i++ )
{
cout << setw(6) << current[i]
<< setw(16) << resistance[i]
<<
setw(10) << volts[i] << endl;
}
}
% g++ volts.cpp
% a.out
Enter the number of volts calculations (<=20): 5
Enter a current value:2.3
Enter a resistance value:35.7
Enter a current value:4
Enter a resistance value:40
Enter a current value:7.9
Enter a resistance value:25.0
Enter a current value:5
Enter a resistance value:87
Enter a current value:2.5
Enter a resistance value:30.5
Current Resistance Volts
2.3
35.7 82.1
4.0
40.0 160.0
7.9
25.0 197.5
5.0
87.0 435.0
2.5
30.5 76.2
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