QT 读取二进制文件例子_wdky2013

http://blog.sina.com.cn/u/2751570410

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QT 读取二进制文件例子

(2012-12-25 12:55:58)

标签：

杂谈

分类： QT

DataStream.h

C++代码 http://xiangjie88.iteye.com/images/spinner.gif读取二进制文件例子" TITLE="QT 读取二进制文件例子" />

#ifndef DATASTREAM_H
#define DATASTREAM_H
#include
#include
class A{
private:
int a1;
QString a2;
public:
A(){
a1 = 0;
a2 = QString();
}
A(int v1,QString v2){
a1 = v1;
a2 = v2;
}
int getA1()const{
return a1;
}
QString getA2()const{
return a2;
}
};
QDataStream& operator<<(QDataStream& out,const A& a);
QDataStream& operator>>(QDataStream& in,A& a);
#endif // DATASTREAM_H

#ifndef DATASTREAM_H
#define DATASTREAM_H
#include 
#include 

class A{
private:
    int a1;
    QString a2;
public:
    A(){
        a1 = 0;
        a2 = QString();
    }

    A(int v1,QString v2){
        a1 = v1;
        a2 = v2;
    }
    int getA1()const{
        return a1;
    }
    QString getA2()const{
        return a2;
    }
};

QDataStream& operator<<(QDataStream& out,const A& a);
QDataStream& operator>>(QDataStream& in,A& a);

#endif // DATASTREAM_H

DataStream.cpp

C++代码 http://xiangjie88.iteye.com/images/spinner.gif读取二进制文件例子" TITLE="QT 读取二进制文件例子" />

#include "DataStream.h"
#include
#include
using namespace std;
QDataStream& operator<<(QDataStream& out,const A& a){
int a1 = a.getA1();
QString a2 = a.getA2();
out << a1;
out << a2;
return out;
}
QDataStream& operator>>(QDataStream& in,A& a){
int a1;
QString a2;
in >> a1;
in >> a2;
a = A(a1,a2);
return in;
}
int main(){
A a(10,"abc");
QString fileName = "test.dat";
QFile writeFile(fileName);
writeFile.open(QIODevice::WriteOnly);
QDataStream out(&writeFile);
out << a;
writeFile.close();
QFile readFile(fileName);
readFile.open(QIODevice::ReadOnly);
QDataStream in(&readFile);
A a2;
in >> a2;
readFile.close();
cout << "a1:" << a2.getA1() << ",a2:" << a2.getA2().toStdString() << endl;
}
a1:10,a2:abc

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QT 读取二进制文件 例子

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QT 读取二进制文件例子