// to_string example
#include <iostream> // std::cout
#include <string> // std::string, std::to_string
int main ()
{
std::string pi = "pi is " + std::to_string(3.1415926);
std::string perfect = std::to_string(1+2+4+7+14) + " is a perfect number";
std::cout << pi << '\n';
std::cout << perfect << '\n';
return 0;
}
Ly8gdG9fc3RyaW5nIGV4YW1wbGUKI2luY2x1ZGUgPGlvc3RyZWFtPiAgIC8vIHN0ZDo6Y291dAojaW5jbHVkZSA8c3RyaW5nPiAgICAgLy8gc3RkOjpzdHJpbmcsIHN0ZDo6dG9fc3RyaW5nCgppbnQgbWFpbiAoKQp7CiAgc3RkOjpzdHJpbmcgcGkgPSAicGkgaXMgIiArIHN0ZDo6dG9fc3RyaW5nKDMuMTQxNTkyNik7CiAgc3RkOjpzdHJpbmcgcGVyZmVjdCA9IHN0ZDo6dG9fc3RyaW5nKDErMis0KzcrMTQpICsgIiBpcyBhIHBlcmZlY3QgbnVtYmVyIjsKICBzdGQ6OmNvdXQgPDwgcGkgPDwgJ1xuJzsKICBzdGQ6OmNvdXQgPDwgcGVyZmVjdCA8PCAnXG4nOwogIHJldHVybiAwOwp9Cg==