IxyvPp - Online C++ Compiler & Debugging Tool

#include <limits.h>
#include <iostream>
#include <math.h>
#include <bitset>
using namespace std;

// Convert the 32-bit binary encoding into hexadecimal
int Binary2Hex( std::string Binary )
{
    std::bitset<32> set(Binary);
    int hex = set.to_ulong();

    return hex;
}

// Convert the 32-bit binary into the decimal
float GetFloat32( std::string Binary )
{
    int HexNumber = Binary2Hex( Binary );

    bool negative  = !!(HexNumber & 0x80000000);
    int  exponent  =   (HexNumber & 0x7f800000) >> 23;
    int sign = negative ? -1 : 1;

    // Subtract 127 from the exponent
    exponent -= 127;

    // Convert the mantissa into decimal using the
    // last 23 bits
    int power = -1;
    float total = 0.0;
    for ( int i = 0; i < 23; i++ )
    {
        int c = Binary[ i + 9 ] - '0';
        total += (float) c * (float) pow( 2.0, power );
        power--;
    }
    total += 1.0;

    float value = sign * (float) pow( 2.0, exponent ) * total;

    return value;
}

int main()
{
	string s;
    for(int i=0; i<102; i++) {\
    	cin >> s;
	    float f = GetFloat32( s );
	    std::cout << f << std::endl;
	}

    return 0;
}