Using variables in system() function c++

Question

  string line;
  ifstream myfile (\"aaa.txt\");
  getline (myfile,line);
  system(\"curl.exe -b cookie.txt -d test=\"+line+\"  

        

Answer 1

Build the string you're passing to system() with a stringstream!

#include 
#include 
#include 
using namespace std;

int main(void){
    string line;
    ifstream myfile("aaa.txt");
    getline(myfile,line);
    stringstream call_line;
    call_line << "curl.exe -b cookie.txt -d test=" << line << "  http://example.com");
    system(call_line.str().c_str());
}