how can I use string variable in system("say string variable")?

Question

/* I thought of doing in this way, but it invalid. so any help will be appreciated. */

#include <cstdlib>
#include <iostream>
#include <string>

using namespace std;
int main()
{
   string name = "Karma";
   string greet = "How was your day?";
   string sums = name + greet;

   system("say %s", sums) // not working
   // system("say sums")  not working

   return 0;
}

Also "Why is “using namespace std” considered bad practice?". — HolyBlackCat
– HolyBlackCat, Commented Oct 28, 2017 at 23:05
system takes a pointer to constant character string not class string. — Raindrop7
– Raindrop7, Commented Oct 28, 2017 at 23:11
@HolyBlackCat, I think it has something to do with overloading functions or library confusion and many of our friends here on Stackoverflow consider it lazy coding. The non- "using namespace... " way of doing it is for every cout or cin is to write it std::cout or std::cin. — Eryn
– Eryn, Commented Oct 29, 2017 at 4:14
@Eryn I know, it wasn't a question. :) It's a title of the question I wanted to show the OP. — HolyBlackCat
– HolyBlackCat, Commented Oct 29, 2017 at 10:03

user8633839 · Accepted Answer · 2017-10-28 23:28:37Z

2

You can use:

system(("say" + sums).c_str())

Instead of:

system("say %s", sums)

answered Oct 28, 2017 at 23:28

user8633839

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