61 lines
1.6 KiB
C++
61 lines
1.6 KiB
C++
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//error4.cpp <20> using exception classes
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#include <iostream>
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#include <cmath> // or math.h, unix users may need -lm flag
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#include "exc_mean.h"
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// function prototypes
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double hmean(double a, double b);
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double gmean(double a, double b);
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int main()
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{
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using std::cout;
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using std::cin;
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using std::endl;
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double x, y, z;
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cout << "Enter two numbers: ";
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while (cin >> x >> y)
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{
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try { // start of try block
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z = hmean(x,y);
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cout << "Harmonic mean of " << x << " and " << y
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<< " is " << z << endl;
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cout << "Geometric mean of " << x << " and " << y
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<< " is " << gmean(x,y) << endl;
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cout << "Enter next set of numbers <q to quit>: ";
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}// end of try block
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catch (bad_hmean & bg) // start of catch block
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{
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bg.mesg();
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cout << "Try again.\n";
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continue;
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}
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catch (bad_gmean & hg)
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{
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cout << hg.mesg();
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cout << "Values used: " << hg.v1 << ", "
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<< hg.v2 << endl;
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cout << "Sorry, you don't get to play any more.\n";
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break;
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} // end of catch block
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}
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cout << "Bye!\n";
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// cin.get();
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// cin.get();
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return 0;
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}
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double hmean(double a, double b)
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{
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if (a == -b)
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throw bad_hmean(a,b);
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return 2.0 * a * b / (a + b);
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}
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double gmean(double a, double b)
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{
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if (a < 0 || b < 0)
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throw bad_gmean(a,b);
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return std::sqrt(a * b);
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}
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