code=<<'EOF'
#include<iostream>
using namespace std;

int main(){
    cout << "hello" << endl;
    return 0;
}
EOF

open("a.cpp", "w") do |io|
    io.write(code)
    io.close
end

system("g++ -std=c++14 -O0 a.cpp -o out")

system("chmod 777 ./out")
exec("./out")