Created
September 28, 2012 22:41
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Realloc in C++ with new
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| #include <iostream> | |
| class Test { | |
| public: | |
| int a,b,c; | |
| Test() { a=b=c=10; } | |
| }; | |
| int main() { | |
| Test *t; | |
| t = new Test; | |
| std::cout << "t = new Text\n"; | |
| std::cout << "t = " << t << "\n"; | |
| t = new(t) Test[5]; | |
| std::cout << "t.a = 5\n"; | |
| std::cout << "t.c = 5\n"; | |
| t->a = 5; | |
| t->c = 5; | |
| std::cout << "t = new(t) Text[5]\n"; | |
| std::cout << "t = " << t << "\n"; | |
| std::cout << "for ( int i = 0; i < 5; i++ )\n"; | |
| for ( int i = 0; i < 5; i++ ) | |
| { | |
| std::cout << " &t["<<i<<"] = "<<&t[i]<<"\n"; | |
| } | |
| std::cout << "t->a = "<<t->a<<"\n"; | |
| std::cout << "t->b = "<<t->b<<"\n"; | |
| std::cout << "t->c = "<<t->c<<"\n"; | |
| return 0; | |
| } | |
| /* | |
| t = new Text | |
| t = 0x134d010 | |
| t.a = 5 | |
| t.c = 5 | |
| t = new(t) Text[5] | |
| t = 0x134d010 | |
| for ( int i = 0; i < 5; i++ ) | |
| &t[0] = 0x134d010 | |
| &t[1] = 0x134d01c | |
| &t[2] = 0x134d028 | |
| &t[3] = 0x134d034 | |
| &t[4] = 0x134d040 | |
| t->a = 5 | |
| t->b = 10 | |
| t->c = 5 | |
| */ |
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