如何将两个qstring合并为一个?

I try to add two QStrings into one. I've read a lot about:

我尝试将两个qstring添加到一个中。我读过很多关于:

QString NAME = QString + QString

QString NAME = QString + QString

but this doesn't helps me here. Thats how my code look so far:

但这对我没有帮助。到目前为止，我的代码是这样的:

test.h

test.h

#ifndef TEST_H
#define TEST_H

#include <QString>
#include <QFile>
#include <QDir>

class Test
{
public:
    void createProject(QString* p, QString*n);
};

#endif // TEST_H

test.cpp

test.cpp

#include "test.h"
#include <QFile>
#include <QString>
#include <QDir>

void Test::createProject(QString *p, QString *n)
{
    QString result = p + n;
    QDir dir(result);
    if (dir.exists())
    {
        // ok
    }
    else
    {
        printf("Error!\n");
    }
}

(ignore the code about checking if the directory exists, btw I use Qt 4.8.6)

(忽略检查目录是否存在的代码，顺便说一句，我使用Qt 4.8.6)

So now when I try to compile, I get this error:

所以当我尝试编译时，我得到了这个错误:

test.cpp: In member function 'void Test::createProject(QString*, QString*)': test.cpp:8:21: error: invalid operands of types 'QString*' and 'QString*' to binary 'operator+'
QString result = p + n;

测试。cpp:在成员函数‘void Test::createProject(QString*， QString*)’中:Test。错误:将‘QString*’和‘QString*’类型的操作数无效到‘operator+’QString result = p + n;

How can I make this work? Also using += instead of + doesn't works here.

我怎样才能让它工作呢?用+=代替+在这里也不行。

~ Jan

~ 1月

1 个解决方案

#1

Indeed you are adding their address as p and n are pointer. try adding their value as:

实际上，你添加了他们的地址作为p和n是指针。试着把它们的价值增加为:

QString result = *p + *n;