Turbo C++ 系统函数 运行 一个可执行文件

Question

如何从 turbo c++ 运行 任何 exe 文件？我知道我应该停止使用 turbo c++ 并将其移至 Dev 或 Code::Blocks，但我的学校不同意，所以我得即兴发挥。

我只想知道如何 运行 带有或不带有 system() 函数的文件。 欢迎任何类型的建议

这是我目前尝试过的方法：

1

#include<process.h>
int main()
{
    system("tnfsv13.exe");     //tnfsv being a 16-bit application(The need for slowness v 13)
    return 0;
} 

2

  #include<process.h>
    int main()
    {
        system("tnfsv13.bat");     
         return 0;
    } 

3. tnfsv13.bat:

   开始"c:\TurboC3\BIN\"tnfsv13.exe

注意：你们有疑问：system() 在 windows XP 中不工作。我在 windows 7 中使用 dosbox 尝试过它并且运行良好，但在 XP 中它完全没有任何作用。甚至 system("dir") 命令似乎都不起作用，但 system(NULL) returns 1. 猜猜为什么？

谢谢。

Answer 1

system() 工作正常，尽管它可能不会完全按照您期望的方式工作：它与在 MSDOS（或 Win32）命令提示符下键入命令的作用相同，包括连接到控制台。

如果您只想 运行 程序传递参数，而不是 return，请使用 exec() 函数族中的一种方便的形式。参见 this 一例。

Answer 2

您还可以使用 Turbo C++ 的 execl() 函数。 execl() 加载并运行 C:\TC\BIN\tnfsv13.exe。 NULL 表示没有要发送到 tnfsv13.exe 的参数。如果发生错误， execl() returns -1 变成 int c 。

#include<stdio.h>
#include<process.h>

int main()
{
    int c = execl("C:\TC\BIN\tnfsv13.exe", NULL);


    return 0;
}

解释：

execl() loads and executes a new child process.  Because the child
process is placed in the memory currently occupied by the calling
process, there must be sufficient memory to load and execute it.

'pathname' specifies the file name of the child process.  If
'pathname' has a file name extension, then only that file is searched
for. If 'pathname' ends with a period (.), then 'pathname' without an
extension is searched for.  If that filename is not found, then
".EXE" is appended and execl() searches again.  If 'pathname' has no
extension and does not end with a period, then execl() searches for
'pathname' and, if it is not found, appends ".COM" and searches
again.  If that is not found, it appends ".EXE" and searches again.

 'arg0', 'arg1',...'argn' are passed to the child process as command-
line parameters.  A NULL pointer must follow 'argn' to terminate the
list of arguments. 'arg0' must not be NULL, and is usually set to
'pathname'.

The combined length of all the strings forming the argument list
passed to the child process must not exceed 128 bytes.  This includes
"n" (for 0-n arguments) space characters (required to separate the
arguments) but does not include the null ('[=11=]') terminating
character.

   Returns:     If execl() is successful, it does not return to the
                calling process. (See the spawn...() routines for a
                similar function that can return to the calling
                process). If an error occurs, execl() returns -1 to
                the calling process. On error, 'errno' (defined in
                <errno.h>) is set to one of the following values
                (defined in <errno.h>):

                E2BIG       Argument list or environment list too big.
                              (List > 128 bytes, or environment > 32k)
                EACCES      Locking or sharing violation on file.
                              (MS-DOS 3.0 and later)
                EMFILE      Too many files open.
                ENOENT      File or path not found.
                ENOEXEC     File not executable.
                ENOMEM      Not enough memory.

     Notes:     Any file open when an exec call is made remains open
                in the child process.  This includes
                'stdin','stdout', 'stderr', 'stdaux', and 'stdprn'.

                The child process acquires the environment of the
                calling process.

                execl() does not preserve the translation modes of
                open files.  Use setmode() in the child process to
                set the desired translation modes.

                See the spawn...() routines for similar though more
                flexible functions that can return to the calling
                program.

   Caution:     The file pointers to open buffered files are not
                always preserved correctly.  The information in the
                buffer may be lost.

                Signal settings are not preserved.  They are reset to
                the default in the child process.

--------------------------------示例------------ ----------------------

The following statements transfer execution to the child process
"child.exe" and pass it the three arguments "child", "arg1",
and"arg2":

       #include <process.h>    /* for 'execl' */
       #include <stdio.h>      /* for 'printf' and 'NULL' */
       #include <errno.h>      /* for 'errno', 'ENOENT' and 'ENOMEM' */

       main()
       {
           execl("child.exe", "child", "arg1", "arg2", NULL);
           /* only get here on an exec error */
           if (errno == ENOENT)
               printf("child.exe not found in current directory\n");
           else if (errno == ENOMEM)
               printf("not enough memory to execute child.exe\n");
           else
               printf("  error #%d trying to exec child.exe\n", errno);
       }