#include <iostream>
#include <sstream>
#include <string>
using namespace std;
 
int main() {
 
	std::wstringstream wstringCmd;
 
	std::wstring wstrExec = L"\"C:\\Windows\\system32\\mspaint.exe\" ";
	std::string strPic = "image.png";
 
	// wstringCmd << wstrExec.c_str() << strPic; // <-- does not compile!
	wstringCmd << wstrExec.c_str() << strPic.c_str();
 
	//std::string wstrCommande = wstringCmd.str(); // <-- does not compile!
	std::wstring wstrCommande = wstringCmd.str();
 
	std::wcout << wstrCommande;
	return 0;
}

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