problem in sending data to pc from microcontroller

Code C - [expand]
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unsigned int send='a';

Code C - [expand]
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#include < avr / io .h >
#include < avr / interrupt .h >
#define USART_BAUDRATE 9600
#define BAUD_PRESCALE ((( F_CPU / ( USART_BAUDRATE * 16 UL ))) - 1)
int main (void)
{
UCSRB |= (1 << RXEN ) | (1 << TXEN ); // Turn on the transmission and reception circuitry
UCSRC |= (1 << URSEL ) | (1 << UCSZ0 ) | (1 << UCSZ1 ); // Use 8-bit character sizes
UBRRH = ( BAUD_PRESCALE >> 8) ; // Load upper 8-bits of the baud rate value into the high byte
of the UBRR register
UBRRL = BAUD_PRESCALE ; // Load lower 8 -bits of the baud rate value into the low byte of the
UBRR register
UCSRB |= (1 << RXCIE ); // Enable the USART Recieve Complete interrupt (USART_RXC)
sei () ; // Enable the Global Interrupt Enable flag so that interrupts can be processed
for (;;) // Loop forever
{
// Do nothing - echoing is handled by the ISR instead of in the main loop
}
}
ISR ( USART_RXC_vect )
{
char ReceivedByte ;
ReceivedByte = UDR ; // Fetch the received byte value into the variable "ByteReceived"
UDR = ReceivedByte ; // Echo back the received byte back to the computer
}