22 lines
663 B
C++
22 lines
663 B
C++
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// external.cpp -- external variable
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// compile with support.cpp
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#include <iostream>
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// external variable
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double warming = 0.3; // warming defined
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// function prototypes
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void update(double dt);
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void local();
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int main() // uses global variable
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{
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using namespace std;
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cout << "Global warming is " << warming << " degrees.\n";
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update(0.1); // call function to change warming
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cout << "Global warming is " << warming << " degrees.\n";
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local(); // call function with local warming
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cout << "Global warming is " << warming << " degrees.\n";
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// cin.get();
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return 0;
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}
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