OOP344 Week2 Command Line Exercises

An exercise on week2 of Oop344 of all operations using commandline.


Add Command Line
// OOP344 Week2 Exercise Peter Huang CMDL Add
#include <iostream>
#include <sstream>
#include <cstdlib>
using namespace std;

int main(int argc, char* argv[], char* env[]) {
  int sum = 0;
  if(argc != 3)
      cout << "Not valid add command. Command format is : add num1 num2" <<endl;
  else{
      for(int i = 1; i < argc; i++)
          sum = sum + atoi(argv[i]);
      cout << "Sum : " << sum <<endl;
  }
  return 0;
}


Subtract Command Line
// OOP344 Week2 Exercise Peter Huang CMDL Subtract
#include <iostream>
#include <sstream>
#include <cstdlib>
using namespace std;

int main(int argc, char* argv[], char* env[]) {
  int dif = 0;
  if(argc != 3)
      cout << "Not valid subtract command. Command format is : sub num1(to) num2(from)" <<endl;
  else {
      dif = atoi(argv[1]) - atoi(argv[2]);
      cout << "Difference : " << dif <<endl;
  }
  return 0;
}


Multiplication Command Line
// OOP344 Week2 Exercise Peter Huang CMDL Multiply
#include <iostream>
#include <sstream>
#include <cstdlib>
using namespace std;

int main(int argc, char* argv[], char* env[]) {
  int ans;
  if(argc != 3)
      cout << "Not valid multiplication command. Command format is : mul num1 num2" <<endl;
  else {
      ans  = atoi(argv[1]) * atoi(argv[2]);
      cout << "Answer(Multiplication) : " << ans <<endl;
  }
  return 0;
}

 
Division Command Line
// OOP344 Week2 Exercise Peter Huang CMDL Divide
#include <iostream>
#include <sstream>
#include <cstdlib>
using namespace std;

int main(int argc, char* argv[], char* env[]) {
  double ans;
  if(argc != 3)
      cout << "Not valid division command. Command format is : div num1(numerator) num2(denominator)" <<endl;
  else  {
      ans  = double(atoi(argv[1])) / atoi(argv[2]);
      cout.precision(2);
      cout << "Answer(Division) : " << ans <<endl;
  }
  return 0;
}