求帮助double变量存储和比较

[噢麦搞的]

贴代码

for(j=6;j<=3;j-=1)
{
p_my_buy_info=p_my_buy_info_bak;

for(i=0;i<All_Number;i++)
{

if(i!=0)
p_my_buy_info++;

if(p_my_buy_info->my_StockRating_Total==0.0000) continue;

if(fabs((double)j-p_my_buy_info->my_StockRating_Total)<1E-3)
{
n_stock_Out2++;

if(n_stock_Out2<=450)
{
strcat(s_tmp2,p_my_buy_info->my_Code);
strcat(s_tmp2,"\n");
}

}

}

}

这里一个问题是p_my_buy_info->my_StockRating_Total原来赋值就是通过

p_my_buy_info->my_StockRating_Total=(double)5 ; //这么赋值的


然后不用循环体，一个个堆起来却可以。、好头疼，百思不得其解

/* 还是错误



for(j=6;j<=3;j-=1)
{
p_my_buy_info=p_my_buy_info_bak;

for(i=0;i<All_Number;i++)
{

if(i!=0)
p_my_buy_info++;

if(p_my_buy_info->my_StockRating_Total==0.0000) continue;

if(fabs((double)j-p_my_buy_info->my_StockRating_Total)<1E-3)
{
n_stock_Out2++;

if(n_stock_Out2<=450)
{
strcat(s_tmp2,p_my_buy_info->my_Code);
strcat(s_tmp2,"\n");
}

}

}

}

*/


p_my_buy_info=p_my_buy_info_bak;

for(i=0;i<All_Number;i++)
{

if(i!=0)
p_my_buy_info++;

if(p_my_buy_info->my_StockRating_Total==0.0000) continue;

if(p_my_buy_info->my_StockRating_Total==6.0000)
{
n_stock_Out2++;

if(n_stock_Out2<=450)
{
strcat(s_tmp2,p_my_buy_info->my_Code);
strcat(s_tmp2,"\n");
}

}

}

p_my_buy_info=p_my_buy_info_bak;

for(i=0;i<All_Number;i++)
{

if(i!=0)
p_my_buy_info++;

if(p_my_buy_info->my_StockRating_Total==0.0000) continue;

if(p_my_buy_info->my_StockRating_Total==5.0000)
{
n_stock_Out2++;

if(n_stock_Out2<=450)
{
strcat(s_tmp2,p_my_buy_info->my_Code);
strcat(s_tmp2,"\n");
}

}

}

p_my_buy_info=p_my_buy_info_bak;

for(i=0;i<All_Number;i++)
{

if(i!=0)
p_my_buy_info++;

if(p_my_buy_info->my_StockRating_Total==0.0000) continue;

if(p_my_buy_info->my_StockRating_Total==4.0000)
{
n_stock_Out2++;

if(n_stock_Out2<=450)
{
strcat(s_tmp2,p_my_buy_info->my_Code);
strcat(s_tmp2,"\n");
}

}

}

p_my_buy_info=p_my_buy_info_bak;

for(i=0;i<All_Number;i++)
{

if(i!=0)
p_my_buy_info++;

if(p_my_buy_info->my_StockRating_Total==0.0000) continue;

if(p_my_buy_info->my_StockRating_Total==3.0000)
{
n_stock_Out2++;

if(n_stock_Out2<=450)
{
strcat(s_tmp2,p_my_buy_info->my_Code);
strcat(s_tmp2,"\n");
}

}

}

这种却可以出来正确结果，为啥？误差这么大吗？


求帮助。