我有一个由其他人用 Fortran 语言编写的程序，它会从标准输入中读取一些内容，然后进行一些计算并输出结果。我想做的是使用来自我用 C 编写的另一个程序的不同输入数据多次运行它。为此，我使用 popen：
FILE *pipe = popen(".\\program.exe", "wt");
if (!pipe) {
exit(1);
}
fprintf(pipe, "%d\n", thing1);
fprintf(pipe, "%d\n", thing2);
...
pclose(pipe);
问题是它不能以这种方式工作。它与“program.exe < input.txt”完美配合，但不是这样。它读取第一件事，然后输出这个愚蠢的错误：“IO-09系统文件错误 - 未知错误”。当然，我不知道这意味着什么，因为我从未编写过 Fortran 程序。
我做错了什么？
编辑：
不幸的是我没有该程序的源代码
I have a program written in Fortran by someone else which consequently reads a few things from the standard input and then does some calculations and outputs the result. What I want to do is to run it many times with different input data from another program, written in C by me. To do this I use popen:
FILE *pipe = popen(".\\program.exe", "wt");
if (!pipe) {
exit(1);
}
fprintf(pipe, "%d\n", thing1);
fprintf(pipe, "%d\n", thing2);
...
pclose(pipe);
The problem is that it doesn't work this way. It works perfectly with "program.exe < input.txt" but not this way. It reads the first thing and then outputs this stupid error: "IO-09 system file error - unknown error". Of course I have no idea what this means as I've never programmed Fortran.
What am I doing wrong?
EDIT:
Unfortunately I have no source code of that program
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看起来应该可以，但不知道为什么不行。你确定吗
popen()在您的 Windows 计算机上可用吗？我依稀记得不适用于某些 Windows 系统。你可以尝试一下
简单的 C 程序，看看它是
popen()还是 Fortran 程序。作为解决方法，您可以将数据写入临时文件，然后
使用
system(".\\program.exe 调用 Fortran 程序。 是的，这是一个拼凑。
It looks like it should work, not sure why it doesn't. Are you sure
popen()is available on your Windows machine? I vaguely recall itnot being available for some Windows systems. You could try it with a
simple C program and see if it's
popen()or the Fortran program.As a workaround, you could write your data to a temporary file, then
use
system(".\\program.exe < tempfile")to call the Fortran program.Yeah, it's a kludge.
您没有说明您正在使用哪个 Fortran 编译器，但最近修复了 gfortran 中长期存在的错误，该错误导致从管道读取失败。请参阅
http://gcc.gnu.org/bugzilla/show_bug.cgi?id= 47694
因此，如果您使用的是 gfortran，您可能需要尝试更新到具有错误修复的版本。
You don't say which Fortran compiler you're using, but recently a long-standing bug in gfortran was fixed where reading from a pipe failed. See
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47694
So in case you're using gfortran you might want to try to update to a version that has the bugfix.