Check out example codes for "convert a float to binary c". It will help you in understanding the concepts better.

Code Example 1

``````// C program to convert a real value
// to IEEE 754 floating point representaion

#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 {

float f;
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 int mantissa : 23;
unsigned int exponent : 8;
unsigned int sign : 1;

} raw;
} myfloat;

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

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

printf("%d | ", var.raw.sign);
printBinary(var.raw.exponent, 8);
printf(" | ");
printBinary(var.raw.mantissa, 23);
printf("\n");
}

// Driver Code
int main()
{

// Instantiate the union
myfloat var;

// Get the real value
var.f = -2.25;

// Get the IEEE floating point representation
printf("IEEE 754 representation of %f is : \n",
var.f);
printIEEE(var);

return 0;
}``````

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