I'm trying to write a program which will create/output multiple files in a folder within a loop, but gives me errors. Is something like this possible to do? Been searching with no luck. Thanks! Here's an example:
#include <iostream>
#include <fstream>
using namespace std;
int main()
{
ofstream text;
for(int i = 0; i < 100; i++);
{
text.open("folder/" + i + ".txt");
text << "This is text file #" << i << "."<< endl;
text.close();
}
return 0;
}
You are trying to add const char * and a number, which is not possible. And this is not what you want. Instead you should do following in your loop
ofstream text;
for(int i = 0; i < 100; i++);
{
string str;
str = "folder/";
std::stringstream ss;
ss << i; //convert int to stringstream
str += ss.str(); //convert stringstream to string
str + = ".txt";
text.open(str); //use final string
text << "This is text file #" << i << "."<< endl;
text.close();
}
Do not forget to include #include <sstream>.
You can't concatenate a simple string and convert a number int string just by writing
"folder/" + i + ".txt";
#include <iostream>
#include <fstream>
using namespace std;
int main()
{
ofstream text;
for(int i = 0; i < 100; i++);
{
stringstream FileName;
FileName<<"folder/"<<i<<".txt;
text.open(FileName.str().c_str());
text << "This is text file #" << i << "."<< endl;
text.close();
}
return 0;
}
I have created the string stream within the loop. Doing so a new string stream is created with each loop and destroyed at the end of the loop Same would work, when you declare the stringstream outside of the loop. But that case you have clear the stringstreeam at the end of each loop
std::string file_path = std::string("folder/") + std::to_string(i) + ".txt"-std=c++11flag.