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Commit | Line | Data |
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8e260d52 DT |
1 | // Pls try the following program on virtual functions and try to do print on |
2 | // most of the code in main(). Almost none of them works ! | |
3 | ||
4 | // | |
5 | // The inheritance structure is: | |
6 | // | |
7 | // V : VA VB | |
8 | // A : (V) | |
9 | // B : A | |
10 | // D : AD (V) | |
11 | // C : (V) | |
12 | // E : B (V) D C | |
13 | // | |
14 | ||
15 | class VA | |
16 | { | |
17 | public: | |
18 | int va; | |
19 | }; | |
20 | ||
21 | class VB | |
22 | { | |
23 | public: | |
24 | int vb; | |
25 | int fvb(); | |
26 | virtual vvb(); | |
27 | }; | |
28 | ||
29 | class V : public VA, public VB | |
30 | { | |
31 | public: | |
32 | int f(); | |
33 | virtual vv(); | |
34 | int w; | |
35 | }; | |
36 | ||
37 | class A : virtual public V | |
38 | { | |
39 | public: | |
40 | virtual int f(); | |
41 | private: | |
42 | int a; | |
43 | }; | |
44 | ||
45 | class B : public A | |
46 | { | |
47 | public: | |
48 | int f(); | |
49 | private: | |
50 | int b; | |
51 | }; | |
52 | ||
53 | class C : public virtual V | |
54 | { | |
55 | public: | |
56 | int c; | |
57 | }; | |
58 | ||
59 | class AD | |
60 | { | |
61 | public: | |
62 | virtual int vg() = 0; | |
63 | }; | |
64 | ||
65 | class D : public AD, virtual public V | |
66 | { | |
67 | public: | |
68 | static void s(); | |
69 | virtual int vg(); | |
70 | virtual int vd(); | |
71 | int fd(); | |
72 | int d; | |
73 | }; | |
74 | ||
75 | class E : public B, virtual public V, public D, public C | |
76 | { | |
77 | public: | |
78 | int f(); | |
79 | int vg(); | |
80 | int vv(); | |
81 | int e; | |
82 | }; | |
83 | ||
84 | D dd; | |
85 | D* ppd = ⅆ | |
86 | AD* pAd = ⅆ | |
87 | ||
88 | A a; | |
89 | B b; | |
90 | C c; | |
91 | D d; | |
92 | E e; | |
93 | V v; | |
94 | VB vb; | |
95 | ||
96 | ||
97 | A* pAa = &a; | |
98 | A* pAe = &e; | |
99 | ||
100 | B* pBe = &e; | |
101 | ||
102 | D* pDd = &d; | |
103 | D* pDe = &e; | |
104 | ||
105 | V* pVa = &a; | |
106 | V* pVv = &v; | |
107 | V* pVe = &e; | |
108 | V* pVd = &d; | |
109 | ||
110 | AD* pADe = &e; | |
111 | ||
112 | E* pEe = &e; | |
113 | ||
114 | VB* pVB = &vb; | |
115 | ||
116 | void init() | |
117 | { | |
118 | a.vb = 1; | |
119 | b.vb = 2; | |
120 | c.vb = 3; | |
121 | d.vb = 4; | |
122 | e.vb = 5; | |
123 | v.vb = 6; | |
124 | vb.vb = 7; | |
125 | ||
126 | d.d = 1; | |
127 | e.d = 2; | |
128 | } | |
129 | ||
130 | extern "C" printf(const char *, ...); | |
131 | ||
132 | int all_count = 0; | |
133 | int failed_count = 0; | |
134 | ||
135 | #define TEST(EXPR, EXPECTED) \ | |
136 | ret = EXPR; \ | |
137 | if (ret != EXPECTED) {\ | |
138 | printf("Failed %s is %d, should be %d!\n", #EXPR, ret, EXPECTED); \ | |
139 | failed_count++; } \ | |
140 | all_count++; | |
141 | ||
142 | int ret; | |
143 | ||
144 | void test_calls() | |
145 | { | |
146 | TEST(pAe->f(), 20); | |
147 | TEST(pAa->f(), 1); | |
148 | ||
149 | TEST(pDe->vg(), 202); | |
150 | TEST(pADe->vg(), 202); | |
151 | TEST(pDd->vg(), 101); | |
152 | ||
153 | TEST(pEe->vvb(), 411); | |
154 | ||
155 | TEST(pVB->vvb(), 407); | |
156 | ||
157 | TEST(pBe->vvb(), 411); | |
158 | TEST(pDe->vvb(), 411); | |
159 | ||
160 | TEST(pEe->vd(), 282); | |
161 | TEST(pEe->fvb(), 311); | |
162 | ||
163 | TEST(pEe->D::vg(), 102); | |
164 | printf("Did %d tests, of which %d failed.\n", all_count, failed_count); | |
165 | } | |
166 | ||
167 | int main() | |
168 | { | |
169 | ||
170 | init(); | |
171 | ||
172 | e.w = 7; | |
173 | e.vb = 11; | |
174 | ||
175 | test_calls(); | |
176 | return 0; | |
177 | ||
178 | } | |
179 | ||
180 | int A::f() {return 1;} | |
181 | int B::f() {return 2;} | |
182 | void D::s() {} | |
183 | int E::f() {return 20;} | |
184 | int D::vg() {return 100+d;} | |
185 | int E::vg() {return 200+d;} | |
186 | int V::f() {return 600+w;} | |
187 | int V::vv() {return 400+w;} | |
188 | int E::vv() {return 450+w;} | |
189 | int D::fd() {return 250+d;} | |
190 | int D::vd() {return 280+d;} | |
191 | int VB::fvb() {return 300+vb;} | |
192 | int VB::vvb() {return 400+vb;} |