Shell Programming and Scripting

#include <iostream>  int main() {
    std::int foo = 34;
    system("mkdir /home/linuxUser/fooDir");
    system("vi fooFile")
    system("write foo in fooFile")
    foo = 43;
    foo = read foo from fooFile;
    std::cout << "foo = " << foo ; }

foo = 34

#include <iostream>
#include <fstream>

using namespace std;

int main() {
        int var =34;
        ofstream varFileOut;
        varFileOut.open("varFile");
        varFileOut <<var<<endl;
        varFileOut.close();

        var = 43;
        ifstream varFileIn;
        varFileIn.open("varFile");
        varFileIn >> var;
        varFileIn.close();

        cout<<"Var is: "<<var<<endl;
        return 0;
}

varFileOut.open("varFile",fstream::app);