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71 lines
1.6 KiB
C++
71 lines
1.6 KiB
C++
2 years ago
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#include "shape.hpp"
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#include "rectangle.hpp"
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#include "circle.hpp"
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#include "qassert.h" // for Q_ASSERT
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Q_DEFINE_THIS_FILE // file name for assertions
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Shape s1(1, 2); // static allocation
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Rectangle r1(1, 2, 15, 10); // static allocation
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std::uint32_t a;
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Circle c1(3, 4, 10); // static allocation
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int main(void) {
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Shape s2(3, 4); // automatic allocation
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Shape *ps3 = new Shape(5, 6); // dynamic allocation
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//Shape const *ps1 = &s1; // const pointer to s1
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Shape *ps = &r1; // automatic upcasting!
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r1.draw(); // early binding
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ps->draw(); // late binding
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a = ps->area();
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Shape const *graph[] = {
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&c1,
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&r1,
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ps3,
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(Shape *)0
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};
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drawGraph(graph); // <== drawGraph() operation
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s1.moveBy(7, 8);
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s2.moveBy(9, 10);
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ps3->moveBy(-1, -2);
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//ps1->moveBy(-3, -4);
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r1.draw();
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a = r1.area();
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r1.moveBy(7, 8);
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Q_ASSERT(r1.distanceFrom(&r1) == 0U);
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Q_ASSERT(s1.distanceFrom(&s1) == 0U);
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Q_ASSERT(s1.distanceFrom(&s2) ==
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s2.distanceFrom(&s1));
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Q_ASSERT(s1.distanceFrom(&s2) <=
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s1.distanceFrom(ps3)
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+ ps3->distanceFrom(&s2));
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delete ps3;
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while (1) {
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}
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//return 0; // unreachable code
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}
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//............................................................................
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extern "C" {
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void Q_onAssert(char const *module, int loc) {
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// TBD: damage control
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(void)module; // avoid the "unused parameter" compiler warning
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(void)loc; // avoid the "unused parameter" compiler warning
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while (1) { // hang in an endless loop
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}
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}
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} // extern "C"
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