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xuxia8495

银虫 (小有名气)

[求助] [已完结]使用fprintf显示不了需要的变量值

FILE *fp;
DEFINE_SOURCE(... ...)
{
... ...
return mass_l;
fp=fopen("masstransfer.txt","a";
fprintf(fp, "%f\n", mass_l)'
fclose(fp);
}

[ Last edited by 1592203609 on 2013-11-1 at 11:52 ]
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shifaziran

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引用回帖:
6楼: Originally posted by shifaziran at 2012-11-23 11:51:05
应该是放到fclose的后面...

DEFINE_SOURCE(...)
{
...
fp = NULL;
int numBytes = 0;
fp = fopen("masstransfer.txt", "a+";
if(fp != NULL)
{
   printf("fp: %p\r\n", fp);
   numBytes = fprintf(fp, "%f\r\n", mass_l);
   if(numBytes <= 0)
   {
      printf("fprintf err!\r\n";
   }
   fclose(fp);
   fp = NULL;
}
else
{
  printf("fopen err!\r\n";
}

return mass_l;
}
你把这段程序替换一下,单步执行调试看看

» 本帖已获得的红花(最新10朵)

Give someone a program, frustrate him for a day.Teach someone to program, frustrate him for a lifetime.
9楼2012-11-23 16:28:14
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xuxia8495

银虫 (小有名气)

使用fprintf想显示mass_l的值,程序如下:

FILE *fp;
DEFINE_SOURCE(... ...)
{
... ...
return mass_l;
fp=fopen("masstransfer.txt","a";
fprintf(fp, "%f\n", mass_l)'
fclose(fp);
}

... ... 是mass_l关于时间的函数,在此省略;已确定所定义的质量传输量mass_l在软件中有加进去;
问题是:上述程序在导入fluent时通过,但是迭代计算时,显示不了mass_l值。

求高手帮忙看看,哪出问题了,谢谢!!
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2楼2012-11-22 17:44:49
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shifaziran

铁虫 (小有名气)

★
xiegangmai: 金币+1, 谢谢参与 2012-11-24 20:58:23
引用回帖:
2楼: Originally posted by xuxia8495 at 2012-11-22 17:44:49
使用fprintf想显示mass_l的值,程序如下:

FILE *fp;
DEFINE_SOURCE(... ...)
{
... ...
return mass_l;
fp=fopen("masstransfer.txt","a";
fprintf(fp, "%f\n", ma ...

你都return mass_l;fopen、fprintf没有被执行
Give someone a program, frustrate him for a day.Teach someone to program, frustrate him for a lifetime.
3楼2012-11-22 21:56:47
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xuxia8495

银虫 (小有名气)

引用回帖:
3楼: Originally posted by shifaziran at 2012-11-22 21:56:47
你都return mass_l;fopen、fprintf没有被执行...

谢谢!下次记得选应助回复哦,好把金币给你。
应该怎么改呢?能不能详细说下,
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4楼2012-11-23 09:46:11
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