Use union to define class : Union Class « Class « C++

Home C++ 1. Bitset 2. Class 3. Console 4. Data Structure 5. Data Type 6. Deque 7. Development 8. File 9. Function 10. Generic 11. Language 12. List 13. Map Multimap 14. Overload 15. Pointer 16. Qt 17. Queue Stack 18. Set Multiset 19. STL Algorithms Binary search 20. STL Algorithms Heap 21. STL Algorithms Helper 22. STL Algorithms Iterator 23. STL Algorithms Merge 24. STL Algorithms Min Max 25. STL Algorithms Modifying sequence operations 26. STL Algorithms Non modifying sequence operations 27. STL Algorithms Sorting 28. STL Basics 29. String 30. Valarray 31. Vector C / ANSI-C C Tutorial C++ Tutorial Visual C++ .NET

C++ » Class » Union Class Screenshots  Use union to define class   #include <iostream> using namespace std; union bits {   bits(double n);   void show_bits();   double d;   unsigned char c[sizeof(double)]; }; bits::bits(double n) {   d = n; } void bits::show_bits() {   int i, j;   for(j = sizeof(double)-1; j>=0; j--) {     cout << "Bit pattern in byte " << j << ": ";     for(i = 128; i; i >>= 1)        if(i & c[j]) cout << "1";       else cout << "0";     cout << endl;   } } int main() {   bits ob(1991.829);   ob.show_bits();   return 0; }                          Related examples in the same category 1. Unions and Classes are Related 2. An anonymous union is a union that has neither a tag name nor any objects specified in its declaration. 3. Anonymous union