C++:不推荐使用从字符串常量转换为'LPSTR {aka char*}'[-Wwrite-strings] - 警告.怎么避免？

Question

在编译C++代码时,我收到此警告:

不推荐使用从字符串常量转换为'LPSTR {aka char*}'[-Wwrite-strings]
&pi))//指向PROCESS_INFORMATION结构的指针.
     ^

代码是:

STARTUPINFO si;
memset(&si, 0, sizeof (STARTUPINFO));
si.cb = sizeof (STARTUPINFO);
si.dwFlags = STARTF_USESHOWWINDOW;
si.wShowWindow = FALSE;

PROCESS_INFORMATION pi;
memset(&pi, 0, sizeof (PROCESS_INFORMATION));

if (!CreateProcess("C:\\Program Files\\Java\\jre7\\bin\\javaw.exe",
        " -jar install.jar", // Command line.
        NULL, // Process handle not inheritable.
        NULL, // Thread handle not inheritable.
        0, // Set handle inheritance to FALSE.
        CREATE_NO_WINDOW, // ON VISTA/WIN7, THIS CREATES NO WINDOW
        NULL, // Use parent's environment block.
        NULL, // Use parent's starting directory.
        &si, // Pointer to STARTUPINFO structure.
        &pi)) // Pointer to PROCESS_INFORMATION structure. //Warning comes from this line - variable &pi
{
    printf("CreateProcess failed\n");
    return 0;
}

是否可以采取措施避免这种情况(我的意思是不使用 - 抑制警告)？

Answer 1

编译器告诉你第二个参数是CreateProcess类型char*但是你正在传递const char*.换句话说,第二个参数CreateProcess需要一个可修改的缓冲区,但是你传递的是一个不可修改的文字.

声明一个可修改的字符串,如下所示:

char cmdline[] = "-jar install.jar";