34 lines
364 B
C++
34 lines
364 B
C++
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#include <iostream>
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using namespace std;
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namespace Circle
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{
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float r;
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float s();
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}
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float Circle::s()
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{
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return 3.14 * r * r;
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}
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namespace Range
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{
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int w, h;
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int s();
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}
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int Range::s()
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{
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return w * h;
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}
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int main()
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{
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cout << "输入半径:";
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cin >> Circle::r;
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float s1 = Circle::s();
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cout << "面积: " << s1;
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return 0;
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}
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