C++ GDAL添加shpfile字段

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#include <iostream>
#include <ogrsf_frmts.h>
#include <ctime>
using namespace std;

int main()
{
	//支持中文路径
	CPLSetConfigOption("GDAL_FILENAME_IS_UTF8", "NO");
	//支持属相表中文字符
	CPLGetConfigOption("SHAPE_ENCODING", "UTF-8");
	//注册所有驱动
	GDALAllRegister();
	const char * shppath = "Supermarket.shp";
	GDALDataset * ds = (GDALDataset *)GDALOpenEx(shppath, GDAL_OF_VECTOR and GDAL_OF_UPDATE, NULL, NULL, NULL);
	if (ds == NULL)
	{
		cout << "Failed to open shapefile!" << endl;
		return 0;
	}
	OGRLayer * lyr = ds->GetLayer(0);
	if (lyr == NULL)
	{
		cout << "Failed to get shape layer!" << endl;
		return 0;
	}
	OGRFieldDefn * fieldDefn = new OGRFieldDefn("money", OFTInteger);
	lyr->CreateField(fieldDefn);
	srand((int)time(NULL));
	while (true)
	{
		OGRFeature * feature = lyr->GetNextFeature();
		if (feature == NULL)
		{
			break;
		}
		int money = rand() % 100;
		feature->SetField("money", money);
		lyr->SetFeature(feature);
		OGRFeature::DestroyFeature(feature);
	}
	GDALClose(ds);
	cout << "finished!" << endl;
	return 0;
}

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