將當前時間輸出到txt中：

調用c++中的fstream流文件，用tm結構獲取日期和時間，其在time.h中定義

#include <iostream>
#include <time.h>
#include <fstream>
using namespace std;

void writeTimeToTxt(string txtname)
{
    ofstream fid(txtname);

    time_t tt = time(NULL);
    struct tm local_time;
    localtime_s(&local_time, &tt);

    fid
        
 
<< "***testing date: "
        << local_time.tm_year + 1900 << "-" << local_time.tm_mon + 1 << "-" << local_time.tm_mday << " "
        << local_time.tm_hour << ":" << local_time.tm_min << ":" << local_time.tm_sec << endl;
    fid.close();

    
 
return;
}

int main()
{
    string txtname = "time.txt";
    writeTimeToTxt(txtname);

    return 1;
}

輸出的結果：

通過argv向程序中輸入參數：

#include <iostream>
#include <string>
using namespace std;

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

    if (4 != argc)
    {
        cout << "input params error
 
" << endl;
        return -1;
    }

    string type = argv[1];
    string cutmethod = argv[2];
    string resolution = argv[3];

    cout << type << "_" << cutmethod << "_" << resolution << endl;
    

    system("pause");
    return 1;
}

輸出結果：

在vs中參數的輸入，項目-屬性-調試-命令參數-train expand 64x64 輸入的字符串，雙引號可加可不加

生成的exe調用過程中，.\OutputTimeToTxt.exe "train" expand 64x64 字符串的雙引號，可加可不加

C++實現的一些功能代碼