/* char = 1 byte */
typedef unsigned char byte;

/* for third method */
union {
  float f;
  byte b[4];
} c;

int main(){
	/* 35.34 = b01000010000011010101110000101001 IEE754 */
	/* 35.34 = 0x420d5c29 IEE754 */

	byte bytes[4];
	/* MSB */
	bytes[3] = 0x42;
	bytes[2] = 0x0d;
	bytes[1] = 0x5c;
	bytes[0] = 0x29;


	/* normal bitshift method */
	unsigned int a1 = bytes[0]<<24;
	a1 |= (bytes[1]<<16);
	a1 |= (bytes[2]<<8);
	a1 |= bytes[3];

	float a = (float)a1;


	/* memcpy method */
	float b = 0;
	memcpy(&b, &bytes, sizeof(b));


	/* union */
	c.b[3] = bytes[3];
	c.b[2] = bytes[2];
	c.b[1] = bytes[1];
	c.b[0] = bytes[0];

	printf("a = %f\nb = %f\nc = %f\n",a,b,c.f);

}