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  • double,int等数据类型转换,传输,还原的示例

    double,int等数据类型转换,传输,还原的示例

    #include <iostream>
    using namespace std;
    int main()
    {
        double d1,d2,d3,d4;
        int i1,i2,i3,i4;
        unsigned char buf1[4]={0};
        unsigned char buf2[4]={0};
        d1=200000.3334;
        d2=-200000.3334;
        d3=d1*1000;d4=d2*1000;
        
        i1=(int)d3;
        i2=(int)d4;
        buf1[0]=i1>>24;
        buf1[1]=i1>>16;
        buf1[2]=i1>>8;
        buf1[3]=i1;
            buf2[0]=i2>>24;
        buf2[1]=i2>>16;
        buf2[2]=i2>>8;
        buf2[3]=i2;
        
        i3=buf1[0]<<24|buf1[1]<<16|buf1[2]<<8|buf1[3];
        i4=buf2[0]<<24|buf2[1]<<16|buf2[2]<<8|buf2[3];
        
        d3=(double)i3/1000;
        d4=(double)i4/1000;
        cout.precision(10); // 设置输出精度
            cout << "tranform test:" << endl;
        cout<<"d1:"<< d1 << endl;
        cout<<"d2:"<< d2 << endl;
        cout<<"i1:"<< i1 << endl;
        cout<<"i2:"<< i2 << endl;
        cout<<"i3:"<< i3 << endl;
        cout<<"i4:"<< i4 << endl;
        cout<<"d3:"<< d3 << endl;
        cout<<"d4:"<< d4 << endl;
        
        return 0;
    }

    运行结果:

    tranform test:
    d1:200000.3334
    d2:-200000.3334
    i1:200000333
    i2:-200000333
    i3:200000333
    i4:-200000333
    d3:200000.333
    d4:-200000.333

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  • 原文地址:https://www.cnblogs.com/Baron-Lu/p/11806831.html
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