c++标准化输出 setw

#include <iostream>#include <sstream>#include <fstream>#include <string>#include <io.h>#include <fstream>#include<iomanip>using namespace std;int main(){ifstream inf;inf.open("file.txt", ifstream::in); string savepath="D:/faceData/";string line;Mat img;int i=0;while (!inf.eof()){getline(inf,line);cout<<line<<endl;img=imread(line,1);stringstream savename;savename<<savepath<<setw(2)<<setfill('0')<<i/24<<"_"<<setw(2)<<setfill('0')<<i%24<<".jpg";imwrite(savename.str(),img);i++;}return 0;}

文件重命名