Determine the scope of each of the variables in Example 20.7.
Be the computer and predict the output of the program.
[ fromfile: scopestorage.xml id: None ]
Example 20.7. src/early-examples/scopex.cpp
#include <iostream> using namespace std; long x = 17; float y = 7.3; static int z = 11; class Thing { int m_Num; public: static int s_Count; Thing(int n = 0) : m_Num(n) {++s_Count;} ~Thing() {--s_Count;} int getNum() { return m_Num; } }; int Thing::s_Count = 0; Thing t(11); int fn(char c, int x) { int z = 5; double y = 6.933; { char y; Thing z(4); y = c + 3; ::y += 0.3; cout << y << endl; } cout << Thing::s_Count << endl; y /= 3.0; ::z++; cout << y << endl; return x + z; } int main() { int x, y = 10; char ch = 'B'; x = fn(ch, y); cout << x << endl; cout << ::y << endl; cout << ::x / 2 << endl; cout << ::z << endl; }
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<include src="src/early-examples/scopex.cpp" href="src/early-examples/scopex.cpp" id="scopexcpp" mode="cpp"/>
Generated: 2012-03-02 | © 2012 Alan Ezust and Paul Ezust. |