42 lines
859 B
C++
42 lines
859 B
C++
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// fun_ptr.cpp -- pointers to functions
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#include <iostream>
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double betsy(int);
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double pam(int);
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// second argument is pointer to a type double function that
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// takes a type int argument
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void estimate(int lines, double (*pf)(int));
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int main()
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{
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using namespace std;
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int code;
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cout << "How many lines of code do you need? ";
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cin >> code;
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cout << "Here's Betsy's estimate:\n";
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estimate(code, betsy);
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cout << "Here's Pam's estimate:\n";
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estimate(code, pam);
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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 betsy(int lns)
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{
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return 0.05 * lns;
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}
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double pam(int lns)
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{
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return 0.03 * lns + 0.0004 * lns * lns;
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}
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void estimate(int lines, double (*pf)(int))
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{
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using namespace std;
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cout << lines << " lines will take ";
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cout << (*pf)(lines) << " hour(s)\n";
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}
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