qtcreator int转qstring

在Qt Creator中，如果你想要将整数(int)转换成QString（Qt中的字符串类型），你可以使用QString::number()函数。这个函数接受一个数值，并返回一个表示该数值的QString。

例如：

int myInt = 42;
QString myQString = QString::number(myInt);

这里，`myInt`是一个整数变量，`QString::number(myInt)`会将其转换为对应的字符串形式，存储在`myQString`中。如果需要特定的基数（如二进制、八进制、十六进制），也可以传入第二个参数，比如`QString::number(myInt, 16)`就是以十六进制显示。

相关问题

qtcreator怎么将qstring转换为int

可以使用QString的toInt()函数将QString转换为int。示例代码如下：

QString str = "123";
int num = str.toInt();

如果QString中包含非数字字符，则转换结果为0。如果要判断转换是否成功，可以使用bool类型的指针作为toInt()函数的第二个参数，示例代码如下：

QString str = "123";
bool ok;
int num = str.toInt(&ok);
if (ok) {
    // 转换成功
} else {
    // 转换失败
}

Qt creator 判断结构体原始数据和修改后数据是否有变动（是否修改或者成员变动），展示完整示例代码。结构体如下：struct T_cjChannelList{ QString name; QString desc; int comType; int interFrameDelay; QString portName; int baudRate; int dataBits; int stopBits; QString parity; QString ip; QString port;}struct T_devList_datapoints{ QString dataId; QString dataDesc; int funcode; int registerAddr; int dataType; int appType; int bit; QString byteOder; QString crcOder; float coef; int calB; }struct T_Devs{ QString devName; QString devDesc; int devAddr; int protocolType; int delayTime; QList<T_devList_datapoints> dataPoints;}struct T_devList{ String channel; QLsit<T_Dev> devs;}struct T_zf_dataPoints{ QString pointId; QString channelId; QString devID; QString dataId; float coef; int calB;}struct T_zfChannelList{ QString name; QString desc; int comType; QString topic; int delayTime; QList<T_zf_dataPoints> dataPoints;}struct Cfg_t{ QList<T_cjChannelList> cjChannelList; QList<T_devList> devList; QList<T_zfChannelList> zfChannelList;}

可以通过重载结构体的比较运算符来判断结构体原始数据和修改后数据是否有变动。以下是一个示例代码：

#include <QDebug>
#include <QList>

struct T_cjChannelList {
    QString name;
    QString desc;
    int comType;
    int interFrameDelay;
    QString portName;
    int baudRate;
    int dataBits;
    int stopBits;
    QString parity;
    QString ip;
    QString port;
    bool operator==(const T_cjChannelList& other) const {
        return (name == other.name && desc == other.desc && comType == other.comType && 
                interFrameDelay == other.interFrameDelay && portName == other.portName && 
                baudRate == other.baudRate && dataBits == other.dataBits && 
                stopBits == other.stopBits && parity == other.parity && ip == other.ip && 
                port == other.port);
    }
};

struct T_devList_datapoints {
    QString dataId;
    QString dataDesc;
    int funcode;
    int registerAddr;
    int dataType;
    int appType;
    int bit;
    QString byteOder;
    QString crcOder;
    float coef;
    int calB;
    bool operator==(const T_devList_datapoints& other) const {
        return (dataId == other.dataId && dataDesc == other.dataDesc && funcode == other.funcode &&
                registerAddr == other.registerAddr && dataType == other.dataType && 
                appType == other.appType && bit == other.bit && byteOder == other.byteOder && 
                crcOder == other.crcOder && coef == other.coef && calB == other.calB);
    }
};

struct T_Devs {
    QString devName;
    QString devDesc;
    int devAddr;
    int protocolType;
    int delayTime;
    QList<T_devList_datapoints> dataPoints;
    bool operator==(const T_Devs& other) const {
        if (devName != other.devName || devDesc != other.devDesc || devAddr != other.devAddr || 
            protocolType != other.protocolType || delayTime != other.delayTime || 
            dataPoints.size() != other.dataPoints.size()) {
            return false;
        }
        for (int i = 0; i < dataPoints.size(); i++) {
            if (dataPoints[i] != other.dataPoints[i]) {
                return false;
            }
        }
        return true;
    }
};

struct T_devList {
    QString channel;
    QList<T_Devs> devs;
    bool operator==(const T_devList& other) const {
        if (channel != other.channel || devs.size() != other.devs.size()) {
            return false;
        }
        for (int i = 0; i < devs.size(); i++) {
            if (devs[i] != other.devs[i]) {
                return false;
            }
        }
        return true;
    }
};

struct T_zf_dataPoints {
    QString pointId;
    QString channelId;
    QString devID;
    QString dataId;
    float coef;
    int calB;
    bool operator==(const T_zf_dataPoints& other) const {
        return (pointId == other.pointId && channelId == other.channelId && devID == other.devID &&
                dataId == other.dataId && coef == other.coef && calB == other.calB);
    }
};

struct T_zfChannelList {
    QString name;
    QString desc;
    int comType;
    QString topic;
    int delayTime;
    QList<T_zf_dataPoints> dataPoints;
    bool operator==(const T_zfChannelList& other) const {
        if (name != other.name || desc != other.desc || comType != other.comType || 
            topic != other.topic || delayTime != other.delayTime || 
            dataPoints.size() != other.dataPoints.size()) {
            return false;
        }
        for (int i = 0; i < dataPoints.size(); i++) {
            if (dataPoints[i] != other.dataPoints[i]) {
                return false;
            }
        }
        return true;
    }
};

struct Cfg_t {
    QList<T_cjChannelList> cjChannelList;
    QList<T_devList> devList;
    QList<T_zfChannelList> zfChannelList;
    bool operator==(const Cfg_t& other) const {
        if (cjChannelList.size() != other.cjChannelList.size() || 
            devList.size() != other.devList.size() || 
            zfChannelList.size() != other.zfChannelList.size()) {
            return false;
        }
        for (int i = 0; i < cjChannelList.size(); i++) {
            if (cjChannelList[i] != other.cjChannelList[i]) {
                return false;
            }
        }
        for (int i = 0; i < devList.size(); i++) {
            if (devList[i] != other.devList[i]) {
                return false;
            }
        }
        for (int i = 0; i < zfChannelList.size(); i++) {
            if (zfChannelList[i] != other.zfChannelList[i]) {
                return false;
            }
        }
        return true;
    }
};

int main() {
    Cfg_t original = { 
        { {"name1", "desc1", 1, 100, "port1", 9600, 8, 1, "N", "192.168.1.1", "1001"},
          {"name2", "desc2", 2, 200, "port2", 115200, 7, 2, "O", "192.168.1.2", "1002"} },
        { {"channel1", { {"devName1", "devDesc1", 1, 1, 1, { {"dataId1", "dataDesc1", 1, 1, 1, 1, 1, "MSB", "CRC16", 1.0, 1} } } } },
          {"channel2", { {"devName2", "devDesc2", 2, 2, 2, { {"dataId2", "dataDesc2", 2, 2, 2, 2, 2, "LSB", "CRC32", 2.0, 2} } } } } },
        { {"name3", "desc3", 3, "topic1", 300, { {"pointId1", "channelId1", "devID1", "dataId1", 3.0, 3} } },
          {"name4", "desc4", 4, "topic2", 400, { {"pointId2", "channelId2", "devID2", "dataId2", 4.0, 4} } } }
    };
    Cfg_t modified = { 
        { {"name1", "desc1", 1, 100, "port1", 9600, 8, 1, "N", "192.168.1.1", "1001"},
          {"name2", "desc2", 2, 200, "port2", 115200, 7, 2, "O", "192.168.1.2", "1002"} },
        { {"channel1", { {"devName1", "devDesc1", 1, 1, 1, { {"dataId1", "dataDesc1", 1, 1, 1, 1, 1, "MSB", "CRC16", 1.0, 1} } } } },
          {"channel2", { {"devName2", "devDesc2", 2, 2, 2, { {"dataId2", "dataDesc2", 2, 2, 2, 2, 2, "LSB", "CRC32", 2.0, 2} } } } } },
        { {"name3", "desc3", 3, "topic1", 300, { {"pointId1", "channelId1", "devID1", "dataId1", 3.0, 3} } },
          {"name4", "desc4", 4, "topic2", 400, { {"pointId2", "channelId2", "devID2", "dataId2", 4.0, 4} } } }
    };
    qDebug() << "Original and modified are equal: " << (original == modified);
    modified.cjChannelList[0].name = "name5";
    qDebug() << "Original and modified are equal: " << (original == modified);
    modified.devList[0].channel = "channel3";
    qDebug() << "Original and modified are equal: " << (original == modified);
    modified.zfChannelList[0].dataPoints[0].pointId = "pointId3";
    qDebug() << "Original and modified are equal: " << (original == modified);
    return 0;
}

在上面的示例代码中，我们定义了多个嵌套结构体，包括 `T_cjChannelList`、`T_devList_datapoints`、`T_Devs`、`T_devList`、`T_zf_dataPoints`、`T_zfChannelList` 和 `Cfg_t`。在每个结构体中，我们都重载了比较运算符 `operator==`。在 `operator==` 中，我们逐个比较结构体中的成员变量是否相等。对于嵌套的结构体，我们可以递归比较其中的元素是否相同。如果结构体原始数据和修改后数据不同，我们返回 `false`。否则，我们返回 `true`。

在 `main` 函数中，我们首先定义了一个名为 `original` 的 `Cfg_t` 结构体并初始化它。然后，我们定义了一个名为 `modified` 的 `Cfg_t` 结构体，并将其中一个成员变量的值修改为不同的值。我们使用 `qDebug` 打印出 `original` 和 `modified` 是否相等的结果。由于 `modified` 结构体与 `original` 结构体不相等，因此第一次打印的结果为 `false`。然后，我们将 `modified` 结构体的值改回与 `original` 结构体相同，并再次打印两者是否相等的结果，此时结果为 `true`。最后，我们将 `modified` 结构体中的一个成员变量的值修改为不同的值，并再次打印两者是否相等的结果，此时结果为 `false`。