File names as mapped values.
Im trying to make a map such that i can access text files, using i/ostream.
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#include <string>
#include <iostream>
#include <fstream>
#include <map>
using namespace std;
int main()
{
std::string input = "input.txt";
ofstream myfile;
myfile.open (input);
myfile << "Writing this to a file.\n";
myfile.close();
return 0;
}
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Ive tried a couple of variations to this but cant seem to get it to work.
Oh i just realized that code isnt the right one heres the right code.
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#include <string>
#include <iostream>
#include <fstream>
#include <map>
using namespace std;
int main()
{
map<string, const char*> myMap;
myMap["input"] = "input.txt";
ofstream myfile;
myfile.open (myMap.find("input"));
myfile << "Writing this to a file.\n";
myfile.close();
return 0;
}
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Last edited on
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#include <string>
#include <iostream>
#include <fstream>
#include <map>
using namespace std;
int main()
{
// map<string, const char*> myMap;
std::map< std::string, std::string > myMap; // safer to store a copy of the path
myMap["input"] = "input.txt";
// ofstream myfile;
// myfile.open (myMap.find("input"));
// myfile << "Writing this to a file.\n";
auto iterator = myMap.find("input") ; // find returns an iterator
if( iterator != myMap.end() ) // if we have found it
{
std::ofstream myfile( iterator->second ) ; // C++11
// std::ofstream myfile( iterator->second.c_str() ) ; // C++98
myfile << "Writing this to a file.\n";
}
// myfile.close();
// return 0;
}
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Thanks.
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