GDB 8.1无法在单线程简单程序中跟踪std :: string变量的值

Question

创建的默认qt小部件项目：

#include "mainwindow.h"
#include <string>
#include <cstring>
#include <QApplication>
#include <iostream>
#include <QDir>

int main(int argc, char *argv[])
{

     std::string s = QDir::currentPath().toLocal8Bit().constData();
     std::string s2 = QDir::currentPath().toLocal8Bit().constData();
     std::string s3 = "dsdasda";
     int t = s.size();
     char str[1024]= { 0 };
     char str2[1024]= { 0 };
     std::memcpy(str,s.c_str(),s.size ());
     std::memcpy(str2,&s,s.size ());
     int i = 0;
     while(str[i]) std::cout << str[i++] ;

    char * pch;

       pch = strtok (str,"/");
       while (pch != NULL)
       {
         printf ("%s\n",pch);
         pch = strtok (NULL, "/");
       }

    QApplication a(argc, argv);
    MainWindow w;
    w.show();
    return a.exec();
}

也是我的.pro文件：

QT       += core gui network widgets

CONFIG += c++11

# The following define makes your compiler emit warnings if you use
# any Qt feature that has been marked deprecated (the exact warnings
# depend on your compiler). Please consult the documentation of the
# deprecated API in order to know how to port your code away from it.
DEFINES += QT_DEPRECATED_WARNINGS

# You can also make your code fail to compile if it uses deprecated APIs.
# In order to do so, uncomment the following line.
# You can also select to disable deprecated APIs only up to a certain version of Qt.
#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0

SOURCES += \
    main.cpp \
    mainwindow.cpp

HEADERS += \
    mainwindow.h

FORMS += \
    mainwindow.ui

# Default rules for deployment.
qnx: target.path = /tmp/$${TARGET}/bin
else: unix:!android: target.path = /opt/$${TARGET}/bin
!isEmpty(target.path): INSTALLS += target

仅由于其他文件是默认文件，所以不粘贴我的问题，因此粘贴了main.cpp。

这里是错误文本（或者可能是警告）：

main.cpp:11:11: error: no type named 'string' in namespace 'std'
main.cpp:17:11: error: no member named 'memcpy' in namespace 'std'
main.cpp:3:10: error: 'cstring' file not found

和其他相同。

这里是错误+调试器屏幕截图：

以及我的套件屏幕截图：

我不知道为什么会有这么多错误（警告？），如果有任何错误，为什么要编译并启动它，以及如何解决所有这些错误。

Answer 1

将其写入您的.pro文件：INCLUDEPATH += /usr/include/c++/{gcc_version}/