An example of a union. - C++ Data Type

C++ examples for Data Type:union

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Description

An example of a union.

Demo Code

#include <iostream> 
using namespace std; 

union Number //from  w w w. java  2  s  .  c  o m
{ 
    int integer1; 
    double double1; 
};

int main() 
{ 
    Number value; // union variable 

    value.integer1 = 100; // assign 100 to member integer1 

    cout << "Put a value in the integer member\n" 
          << "and print both members.\nint:            " 
          << value.integer1 << "\ndouble: " << value.double1 
          << endl; 

    value.double1 = 100.0;  // assign 100.0 to member double1 

    cout << "Put a value in the floating member\n" 
          << "and print both members.\nint:            " 
          << value.integer1 << "\ndouble: " << value.double1 
          << endl; 
}

Result


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