Please help ! it's my eight queen program source but..

#include <stdio.h>
#include <math.h>


#define SIZE 8

int stack[SIZE];
int count=0;


int find_place(int row);
int fill_block(int row);

int main(void)
{
    fill_block(0);

    return 0;
}



display()
{

    int row,col;
    printf("\n");
    printf("-----------",++count);
    for (row = 0; row < SIZE; row++)
    {
        for (col = 0; col< SIZE; col++)
        {
            if(stack[row]==col)printf(" Q ");
            else               printf(" _ ");
        }
        printf("\n");
    }
}


find_place(int row)
{

    for (int j = 0; j < row; j++)

    {

        if (abs(stack[row] - stack[j]) == (row - j) || (stack[j] == stack[row]) )

        {

            return 0;

        }

    }

    return 1;
}

fill_block(int row)
{

    if (row == SIZE) {

        display();

    }
    else {

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

            stack[row] = i;

            if (find_place(row))

                fill_block(row+1);

  }


    }
    return -1;
}