system(./start_tour 1),start_tour怎么获取这个参数1
时间: 2024-02-24 18:53:41 浏览: 97
一般情况下,程序在启动时可以通过命令行参数传递参数。在 C/C++ 中,这些参数可以通过 `main()` 函数的参数列表 `argc` 和 `argv` 获取。其中,`argc` 表示参数个数,`argv` 是一个指向字符串数组的指针,每个字符串表示一个参数。
在你提供的 `system("./start_tour 1")` 命令中,`1` 是作为参数传递给 `start_tour` 程序的。如果 `start_tour` 程序是由你编写的,那么可以在程序中通过 `argc` 和 `argv` 获取这个参数,例如:
```c++
int main(int argc, char* argv[]) {
if (argc > 1) {
int arg1 = atoi(argv[1]); // 将第一个参数转换为整数
// ...
}
return 0;
}
```
这个程序会检查 `argc` 是否大于 1,如果是,则将第一个参数转换为整数并存储在 `arg1` 变量中。你可以在程序中根据实际需要获取和使用这个参数。
相关问题
os.system('start ./start_test_visual.exe')怎么以管理员权限运行
要以管理员权限运行 `os.system` 命令,可以按照以下步骤操作:
1. 导入 `os` 模块。
```python
import os
```
2. 构造一个以管理员权限运行的命令行。
```python
command = 'powershell -Command "Start-Process -FilePath ./start_test_visual.exe -Verb RunAs"'
```
这个命令使用 PowerShell 的 `Start-Process` 命令以管理员权限启动 `start_test_visual.exe` 应用程序。
3. 调用 `os.system` 函数运行命令。
```python
os.system(command)
```
这将以管理员权限运行命令,并启动 `start_test_visual.exe` 应用程序。
注意,使用管理员权限运行命令需要谨慎,因为这可能会导致系统不稳定或者安全问题。
/usr/lib/gcc/x86_64-linux-gnu/5/../../../x86_64-linux-gnu/crt1.o: In function `_start':
`_start` is a special function in the C runtime library that is called at the beginning of a program's execution. The error message you provided indicates that there was an issue with the `_start` function in the `crt1.o` object file, which is a system file that is linked into your program automatically by the linker.
This error message suggests that there may be a problem with your compiler or the system libraries on your machine. One possible cause of this error is a missing or corrupt `libc` library, which provides the standard C library functions used by many programs. You may want to try reinstalling your system's C runtime libraries to see if that resolves the issue.
It's also possible that there is a problem with your code itself, such as a missing `main` function. Make sure that your code is properly structured and free of syntax errors.
If you're still having trouble, you may want to consult with a more experienced programmer or seek help from online forums or support communities.