#include <istream>
#include <string>
#include <stdlib.h>


using namespace std;
int main(){

Calculator calculator;

cout << "Enter a command followed by two numbers";
string line;
getline(cin, line);
int a, b;
bool ran=false;
if(line.substr(0, 1)=="a" || line.substr(0, 1)=="A")
{
    for(int i=0; i<line.size(); i++){
        if(isdigit(line[i]))
            if(ran)
                b=atoi(line[i].c_str());
            else
                a=atoi(line[i].c_str());
    }
    calculator.add(a, b);

}
else if(line.substr(0, 1)=="s" || line.substr(0, 1)=="S"){

    for(int i=0; i<line.size(); i++){
        if(isdigit(line[i])){
            if(ran)
                b=atoi(line[i].c_str());
            else
                a=atoi(line[i].c_str());
        }
    }
    calculator.subtract(a, b);
}
else if(line.substr(0, 1)=="m" || line.substr(0, 1)=="M"){

    for(int i=0; i<line.size(); i++){
        if(isdigit(line[i])){
            if(ran)
                b=atoi(line[i].c_str());
            else
                a=atoi(line[i].c_str());
        }
    }
    calculator.multiply(a, b);
}
else if(line.substr(0, 1)=="d" || line.substr(0, 1)=="D"){

    for(int i=0; i<line.size(); i++){
        if(isdigit(line[i])){
            if(ran)
                b=atoi(line[i].c_str());
            else
                a=atoi(line[i].c_str());
        }
    }
    calculator.divide(a, b);
}
return 0;
}