UnionTest

#include <stdio.h> 

void printBinary(int n, int i)
{

    // Prints the binary representation 
    // of a number n up to i-bits. 
    int k;
    for (k = i - 1; k >= 0; k--) {

        if ((n >> k) & 1)
            printf("1");
        else
            printf("0");
    }
}

typedef union {

    double d;
    struct
    {

        // Order is important. 
        // Here the members of the union data structure 
        // use the same memory (32 bits). 
        // The ordering is taken 
        // from the LSB to the MSB. 
        unsigned long long int mantissa : 52;
        unsigned long long int exponent : 11;
        unsigned long long int sign : 1;

    } raw;
} mydouble;

// Function to convert real value 
// to IEEE foating point representation 
void printIEEE(mydouble var)
{

    // Prints the IEEE 754 representation 
    // of a float value (32 bits) 

    printBinary(var.raw.sign, 1);
    printf(" | ");
    printBinary(var.raw.exponent, 11);
    printf(" | ");
    printBinary(var.raw.mantissa, 52);
    printf("\n");
}

// Driver Code 
int main()
{

    // Instantiate the union 
    mydouble var;

    // Get the real value 
    var.d = 85,125;

    // Get the IEEE floating point representation 
    printIEEE(var);

    return 0;
}