opencv批量修改图片尺寸

#include"opencv2/opencv.hpp"

using namespace std;
using namespace cv;
#include<opencv2/opencv.hpp>
#include<iostream>
using namespace cv;
using namespace std;
int main()
{
    int a = 100;
    char path[90];
    for (a = 100; a < 248;a++)
    {
        sprintf(path, "E:\SVM_Class\trainnigdata\%d.jpg", a);
        
        Mat inputImg = imread(path, 0);
        
        Mat resizea;
        resizea.create(256, 224, CV_8UC1);
        resize(inputImg, resizea, resizea.size(), 0, 0, INTER_CUBIC);
        if (1)
        {
            stringstream ss;
            ss << a << ".jpg";
            imwrite(ss.str(), resizea);
            
        }
    }
    system("pause");
}