PRINTF ERROR IN NIOS II ECLIPSE

[Manprocoder]

#include <stdio.h>

#include "system.h"

#include "io.h"

//------------------------------

//display CRC_seq output in binary format

//------------------------------

/*void decimalToBinary(int n) {

    int a =0;

    for(int i =0; i<8; i++){

    a = n>>(7-i) & 0x1;

    printf("%d", a);

    }

    printf("\n");

}*/

int main(){

//result variable

int crc_seq=0;

int write_data =0;

//Generator Polynomial(da thuc sinh) 0xd5

//int genPoly = 213 & 0xff;

int genPoly = 0xd5;

//0x0a55, 0x0a56, 0x0a57, 0x0a58, 0x0a59

//int data[5] = {2645, 2646, 2647, 2648, 2649};

int data[3] = {0x0a55, 0x0a56, 0x0a57};

//write genPoly down to design

IOWR(CRC_0_BASE, 0, genPoly);

printf("Hello Nios II!!!\n");

//--------------------------------------------------------------

//write valid data and read respective CRC sequence

//---------------------------------------------------------------

printf("Before IOWR...\n");

for(int i =0; i<3; i++){

write_data = data[i] & 0xffff;

IOWR(CRC_0_BASE, 1, write_data);

printf("After IOWR...\n");

printf("\nData[%d]: 0x%04x", i, write_data);

crc_seq = IORD(CRC_0_BASE,2)&0xff;

printf("\nCRC[%d] = 0x%02x", i, crc_seq);

}

return 0;

}
TOOL: quartus, nios ii eclipse, ModelSim
MY ISSUE: i do not see content  of this function "printf("After IOWR...\n");" on console although IOWR(CRC_0_BASE, 1, write_data); is implemented successfully.
Additional Note: all of contents of all printf before this command "IOWR(CRC_0_BASE, 1, write_data)" are successfully displayed onto console.
HELP ME. THANKS A LOT.

[Viet_H_Intel]

Please provide a compiler version (icx/icpx) along with command line options and a compile-able and run-able test case.